./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/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_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/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_03f68833-b41d-4059-b376-0fdb85a6be26/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 91d7b70e505e7aef19ce206c76dac3b8838d1608e22286f0e4e4335d9f63c057 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:57:50,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:57:50,407 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 06:57:50,412 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:57:50,412 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:57:50,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:57:50,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:57:50,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:57:50,437 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:57:50,437 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:57:50,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:57:50,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:57:50,439 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:57:50,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:57:50,440 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:57:50,441 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:57:50,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:57:50,442 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:57:50,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:57:50,443 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:57:50,443 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:57:50,444 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:57:50,444 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:57:50,445 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:57:50,445 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 06:57:50,445 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:57:50,446 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:57:50,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:57:50,447 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:57:50,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:57:50,447 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:57:50,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:57:50,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:57:50,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:57:50,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:57:50,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:57:50,449 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:57:50,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:57:50,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:57:50,456 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:57:50,456 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:57:50,457 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:57:50,457 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:57:50,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:57:50,458 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_03f68833-b41d-4059-b376-0fdb85a6be26/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91d7b70e505e7aef19ce206c76dac3b8838d1608e22286f0e4e4335d9f63c057 [2023-11-29 06:57:50,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:57:50,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:57:50,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:57:50,703 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:57:50,703 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:57:50,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2023-11-29 06:57:53,477 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:57:53,662 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:57:53,662 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2023-11-29 06:57:53,671 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/data/229f4322b/8ecf148985fb476bba5196053107c152/FLAGc233afd11 [2023-11-29 06:57:53,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/data/229f4322b/8ecf148985fb476bba5196053107c152 [2023-11-29 06:57:53,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:57:53,689 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:57:53,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:57:53,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:57:53,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:57:53,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:53,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ffc7f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53, skipping insertion in model container [2023-11-29 06:57:53,697 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:53,722 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:57:53,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:57:53,901 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:57:53,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:57:53,937 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:57:53,937 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:57:53,942 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:57:53,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53 WrapperNode [2023-11-29 06:57:53,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:57:53,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:57:53,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:57:53,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:57:53,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:53,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:53,988 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 261 [2023-11-29 06:57:53,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:57:53,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:57:53,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:57:53,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:57:54,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,024 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 4, 2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 06:57:54,024 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,024 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:57:54,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:57:54,050 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:57:54,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:57:54,051 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (1/1) ... [2023-11-29 06:57:54,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:57:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:57:54,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:57:54,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:57:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:57:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:57:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:57:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:57:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:57:54,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:57:54,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:57:54,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:57:54,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:57:54,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:57:54,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:57:54,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:57:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:57:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:57:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:57:54,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:57:54,121 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:57:54,227 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:57:54,228 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:57:54,596 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:57:55,028 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:57:55,028 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 06:57:55,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:57:55 BoogieIcfgContainer [2023-11-29 06:57:55,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:57:55,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:57:55,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:57:55,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:57:55,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:57:53" (1/3) ... [2023-11-29 06:57:55,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b812ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:57:55, skipping insertion in model container [2023-11-29 06:57:55,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:57:53" (2/3) ... [2023-11-29 06:57:55,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b812ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:57:55, skipping insertion in model container [2023-11-29 06:57:55,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:57:55" (3/3) ... [2023-11-29 06:57:55,037 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2023-11-29 06:57:55,045 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:57:55,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:57:55,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-29 06:57:55,053 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:57:55,173 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 06:57:55,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 161 flow [2023-11-29 06:57:55,236 INFO L124 PetriNetUnfolderBase]: 4/67 cut-off events. [2023-11-29 06:57:55,236 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:57:55,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 4/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 226 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-29 06:57:55,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 161 flow [2023-11-29 06:57:55,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 65 transitions, 145 flow [2023-11-29 06:57:55,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:57:55,259 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;@4c2803ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:57:55,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-11-29 06:57:55,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:57:55,263 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 06:57:55,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:57:55,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:57:55,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:57:55,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:57:55,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:57:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 818064, now seen corresponding path program 1 times [2023-11-29 06:57:55,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:57:55,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108790948] [2023-11-29 06:57:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:55,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:57:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:55,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:57:55,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108790948] [2023-11-29 06:57:55,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108790948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:57:55,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:57:55,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:57:55,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396905859] [2023-11-29 06:57:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:57:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:57:55,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:55,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:57:55,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:57:55,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:57:55,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:55,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:57:55,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:57:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:57:56,568 INFO L124 PetriNetUnfolderBase]: 3107/4872 cut-off events. [2023-11-29 06:57:56,568 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-29 06:57:56,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9521 conditions, 4872 events. 3107/4872 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 32429 event pairs, 2653 based on Foata normal form. 1/2797 useless extension candidates. Maximal degree in co-relation 8588. Up to 4425 conditions per place. [2023-11-29 06:57:56,606 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 39 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-29 06:57:56,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 225 flow [2023-11-29 06:57:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:57:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:57:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2023-11-29 06:57:56,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2023-11-29 06:57:56,617 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 139 transitions. [2023-11-29 06:57:56,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 139 transitions. [2023-11-29 06:57:56,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:57:56,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 139 transitions. [2023-11-29 06:57:56,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:56,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:56,625 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:56,627 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 145 flow. Second operand 4 states and 139 transitions. [2023-11-29 06:57:56,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 225 flow [2023-11-29 06:57:56,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 06:57:56,648 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 153 flow [2023-11-29 06:57:56,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-11-29 06:57:56,653 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-11-29 06:57:56,654 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 153 flow [2023-11-29 06:57:56,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:56,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:57:56,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 06:57:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:57:56,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:57:56,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:57:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1398062230, now seen corresponding path program 1 times [2023-11-29 06:57:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:57:56,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665046406] [2023-11-29 06:57:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:57:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:57:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665046406] [2023-11-29 06:57:56,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665046406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:57:56,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071801684] [2023-11-29 06:57:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:57:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:57:56,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:57:56,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:57:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:56,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:57:56,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:57:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:56,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:57:56,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071801684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:57:56,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:57:56,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 06:57:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637164618] [2023-11-29 06:57:56,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:57:56,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:57:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:57:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:57:56,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:57:56,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 153 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:56,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:57:56,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:57:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:57:57,929 INFO L124 PetriNetUnfolderBase]: 3107/4871 cut-off events. [2023-11-29 06:57:57,930 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-29 06:57:57,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9449 conditions, 4871 events. 3107/4871 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 32400 event pairs, 2653 based on Foata normal form. 1/2797 useless extension candidates. Maximal degree in co-relation 9422. Up to 4420 conditions per place. [2023-11-29 06:57:57,975 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 35 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-11-29 06:57:57,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 233 flow [2023-11-29 06:57:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:57:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:57:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2023-11-29 06:57:57,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 06:57:57,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 175 transitions. [2023-11-29 06:57:57,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 175 transitions. [2023-11-29 06:57:57,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:57:57,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 175 transitions. [2023-11-29 06:57:57,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:57,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:57,983 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:57,983 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 153 flow. Second operand 6 states and 175 transitions. [2023-11-29 06:57:57,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 233 flow [2023-11-29 06:57:57,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:57:57,985 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 160 flow [2023-11-29 06:57:57,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-11-29 06:57:57,986 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-29 06:57:57,987 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 160 flow [2023-11-29 06:57:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:57,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:57:57,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 06:57:57,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:57:58,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:57:58,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:57:58,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:57:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1395210740, now seen corresponding path program 1 times [2023-11-29 06:57:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:57:58,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417721583] [2023-11-29 06:57:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:57:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:57:58,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417721583] [2023-11-29 06:57:58,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417721583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:57:58,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:57:58,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:57:58,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231901644] [2023-11-29 06:57:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:57:58,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:57:58,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:57:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:57:58,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-29 06:57:58,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 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 06:57:58,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:57:58,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-29 06:57:58,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:57:59,578 INFO L124 PetriNetUnfolderBase]: 4649/7417 cut-off events. [2023-11-29 06:57:59,578 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 06:57:59,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14339 conditions, 7417 events. 4649/7417 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 51979 event pairs, 3416 based on Foata normal form. 0/4436 useless extension candidates. Maximal degree in co-relation 10533. Up to 4922 conditions per place. [2023-11-29 06:57:59,635 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 86 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2023-11-29 06:57:59,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 449 flow [2023-11-29 06:57:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:57:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:57:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2023-11-29 06:57:59,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914285714285714 [2023-11-29 06:57:59,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 207 transitions. [2023-11-29 06:57:59,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 207 transitions. [2023-11-29 06:57:59,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:57:59,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 207 transitions. [2023-11-29 06:57:59,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.4) internal successors, (207), 5 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 06:57:59,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:59,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:59,642 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 160 flow. Second operand 5 states and 207 transitions. [2023-11-29 06:57:59,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 449 flow [2023-11-29 06:57:59,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 427 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 06:57:59,646 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 163 flow [2023-11-29 06:57:59,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-29 06:57:59,647 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-29 06:57:59,647 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 163 flow [2023-11-29 06:57:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 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 06:57:59,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:57:59,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 06:57:59,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:57:59,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:57:59,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:57:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -390255369, now seen corresponding path program 1 times [2023-11-29 06:57:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:57:59,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686975163] [2023-11-29 06:57:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:59,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:57:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:57:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686975163] [2023-11-29 06:57:59,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686975163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:57:59,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875536824] [2023-11-29 06:57:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:59,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:57:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:57:59,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:57:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:57:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:59,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:57:59,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:57:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:59,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:57:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875536824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:57:59,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:57:59,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 06:57:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71931795] [2023-11-29 06:57:59,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:57:59,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:57:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:57:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:57:59,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:57:59,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 163 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:57:59,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:57:59,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:57:59,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:01,159 INFO L124 PetriNetUnfolderBase]: 4298/6858 cut-off events. [2023-11-29 06:58:01,159 INFO L125 PetriNetUnfolderBase]: For 1181/1302 co-relation queries the response was YES. [2023-11-29 06:58:01,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14164 conditions, 6858 events. 4298/6858 cut-off events. For 1181/1302 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 48319 event pairs, 3706 based on Foata normal form. 3/4109 useless extension candidates. Maximal degree in co-relation 9804. Up to 6198 conditions per place. [2023-11-29 06:58:01,213 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 40 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2023-11-29 06:58:01,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 299 flow [2023-11-29 06:58:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:58:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:58:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2023-11-29 06:58:01,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914285714285714 [2023-11-29 06:58:01,216 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 274 transitions. [2023-11-29 06:58:01,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 274 transitions. [2023-11-29 06:58:01,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:01,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 274 transitions. [2023-11-29 06:58:01,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:01,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:01,221 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:01,221 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 163 flow. Second operand 10 states and 274 transitions. [2023-11-29 06:58:01,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 299 flow [2023-11-29 06:58:01,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:58:01,225 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 232 flow [2023-11-29 06:58:01,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2023-11-29 06:58:01,227 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2023-11-29 06:58:01,227 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 232 flow [2023-11-29 06:58:01,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:01,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:01,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:01,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 06:58:01,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 06:58:01,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:01,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:01,435 INFO L85 PathProgramCache]: Analyzing trace with hash -800307486, now seen corresponding path program 1 times [2023-11-29 06:58:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:01,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697232934] [2023-11-29 06:58:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:01,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:01,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697232934] [2023-11-29 06:58:01,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697232934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:01,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:01,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:01,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973638764] [2023-11-29 06:58:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:01,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-29 06:58:01,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:01,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:01,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-29 06:58:01,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:02,413 INFO L124 PetriNetUnfolderBase]: 3882/6204 cut-off events. [2023-11-29 06:58:02,413 INFO L125 PetriNetUnfolderBase]: For 708/869 co-relation queries the response was YES. [2023-11-29 06:58:02,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12574 conditions, 6204 events. 3882/6204 cut-off events. For 708/869 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 41469 event pairs, 3226 based on Foata normal form. 0/3691 useless extension candidates. Maximal degree in co-relation 12538. Up to 4975 conditions per place. [2023-11-29 06:58:02,446 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 81 selfloop transitions, 5 changer transitions 2/107 dead transitions. [2023-11-29 06:58:02,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 495 flow [2023-11-29 06:58:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:58:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2023-11-29 06:58:02,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2023-11-29 06:58:02,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 195 transitions. [2023-11-29 06:58:02,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 195 transitions. [2023-11-29 06:58:02,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:02,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 195 transitions. [2023-11-29 06:58:02,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:02,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:02,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:02,451 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 232 flow. Second operand 5 states and 195 transitions. [2023-11-29 06:58:02,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 495 flow [2023-11-29 06:58:02,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 484 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 06:58:02,455 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 246 flow [2023-11-29 06:58:02,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-11-29 06:58:02,457 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-11-29 06:58:02,457 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 246 flow [2023-11-29 06:58:02,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:02,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:02,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:58:02,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:02,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1370376206, now seen corresponding path program 1 times [2023-11-29 06:58:02,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:02,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733240832] [2023-11-29 06:58:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:02,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:02,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733240832] [2023-11-29 06:58:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733240832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178679753] [2023-11-29 06:58:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:02,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:02,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:58:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:02,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:58:02,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:02,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:58:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:02,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:02,940 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 06:58:02,944 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 06:58:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:02,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178679753] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:02,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:02,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 06:58:02,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521112157] [2023-11-29 06:58:02,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:02,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:02,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-29 06:58:02,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 246 flow. Second operand has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:02,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:02,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-29 06:58:02,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:04,181 INFO L124 PetriNetUnfolderBase]: 5414/9374 cut-off events. [2023-11-29 06:58:04,181 INFO L125 PetriNetUnfolderBase]: For 1628/2087 co-relation queries the response was YES. [2023-11-29 06:58:04,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18881 conditions, 9374 events. 5414/9374 cut-off events. For 1628/2087 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 71695 event pairs, 1786 based on Foata normal form. 0/5850 useless extension candidates. Maximal degree in co-relation 18843. Up to 2567 conditions per place. [2023-11-29 06:58:04,226 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 103 selfloop transitions, 16 changer transitions 1/140 dead transitions. [2023-11-29 06:58:04,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 140 transitions, 640 flow [2023-11-29 06:58:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:58:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:58:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 304 transitions. [2023-11-29 06:58:04,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-29 06:58:04,229 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 304 transitions. [2023-11-29 06:58:04,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 304 transitions. [2023-11-29 06:58:04,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:04,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 304 transitions. [2023-11-29 06:58:04,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.0) internal successors, (304), 8 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:04,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:04,232 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:04,233 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 246 flow. Second operand 8 states and 304 transitions. [2023-11-29 06:58:04,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 140 transitions, 640 flow [2023-11-29 06:58:04,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:58:04,238 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 314 flow [2023-11-29 06:58:04,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2023-11-29 06:58:04,239 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-11-29 06:58:04,239 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 314 flow [2023-11-29 06:58:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.454545454545453) internal successors, (280), 11 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:04,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:04,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:58:04,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:58:04,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:04,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:04,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1370376202, now seen corresponding path program 1 times [2023-11-29 06:58:04,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:04,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176645528] [2023-11-29 06:58:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:04,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:58:04,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176645528] [2023-11-29 06:58:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176645528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:04,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:58:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600456202] [2023-11-29 06:58:04,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:58:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:58:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:04,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-29 06:58:04,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:04,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:04,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-29 06:58:04,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:05,676 INFO L124 PetriNetUnfolderBase]: 5894/10358 cut-off events. [2023-11-29 06:58:05,676 INFO L125 PetriNetUnfolderBase]: For 4632/4967 co-relation queries the response was YES. [2023-11-29 06:58:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23655 conditions, 10358 events. 5894/10358 cut-off events. For 4632/4967 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 82284 event pairs, 2056 based on Foata normal form. 0/6978 useless extension candidates. Maximal degree in co-relation 23614. Up to 5063 conditions per place. [2023-11-29 06:58:05,736 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 83 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-11-29 06:58:05,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 104 transitions, 537 flow [2023-11-29 06:58:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:58:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:58:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 06:58:05,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619047619047619 [2023-11-29 06:58:05,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 06:58:05,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 06:58:05,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:05,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 06:58:05,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:05,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:05,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:05,741 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 314 flow. Second operand 3 states and 139 transitions. [2023-11-29 06:58:05,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 104 transitions, 537 flow [2023-11-29 06:58:05,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 104 transitions, 520 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-29 06:58:05,755 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 299 flow [2023-11-29 06:58:05,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2023-11-29 06:58:05,756 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-11-29 06:58:05,757 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 299 flow [2023-11-29 06:58:05,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:05,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:05,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:58:05,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:05,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1370376205, now seen corresponding path program 1 times [2023-11-29 06:58:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:05,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756195546] [2023-11-29 06:58:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:06,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:06,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756195546] [2023-11-29 06:58:06,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756195546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:06,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963690077] [2023-11-29 06:58:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:06,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:06,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:06,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:06,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:58:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:06,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:58:06,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:06,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:58:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:06,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:06,235 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 06:58:06,239 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 06:58:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963690077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:06,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 06:58:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755724307] [2023-11-29 06:58:06,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:58:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:58:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:58:06,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-29 06:58:06,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:06,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:06,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-29 06:58:06,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:07,442 INFO L124 PetriNetUnfolderBase]: 4832/8283 cut-off events. [2023-11-29 06:58:07,442 INFO L125 PetriNetUnfolderBase]: For 4121/4561 co-relation queries the response was YES. [2023-11-29 06:58:07,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19614 conditions, 8283 events. 4832/8283 cut-off events. For 4121/4561 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 62519 event pairs, 1494 based on Foata normal form. 0/5581 useless extension candidates. Maximal degree in co-relation 19573. Up to 3337 conditions per place. [2023-11-29 06:58:07,482 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 100 selfloop transitions, 16 changer transitions 1/138 dead transitions. [2023-11-29 06:58:07,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 669 flow [2023-11-29 06:58:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:58:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:58:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2023-11-29 06:58:07,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2023-11-29 06:58:07,485 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 301 transitions. [2023-11-29 06:58:07,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 301 transitions. [2023-11-29 06:58:07,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:07,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 301 transitions. [2023-11-29 06:58:07,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:07,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:07,487 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:07,487 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 299 flow. Second operand 8 states and 301 transitions. [2023-11-29 06:58:07,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 669 flow [2023-11-29 06:58:07,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:58:07,495 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 325 flow [2023-11-29 06:58:07,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-11-29 06:58:07,496 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2023-11-29 06:58:07,497 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 325 flow [2023-11-29 06:58:07,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.4) internal successors, (254), 10 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:07,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:07,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:07,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:58:07,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 06:58:07,702 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:07,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash -311055647, now seen corresponding path program 1 times [2023-11-29 06:58:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:07,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582472197] [2023-11-29 06:58:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:07,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:07,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582472197] [2023-11-29 06:58:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582472197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:07,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:58:07,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044020170] [2023-11-29 06:58:07,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:58:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:58:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:58:07,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-29 06:58:07,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:07,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:07,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-29 06:58:07,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:08,746 INFO L124 PetriNetUnfolderBase]: 5089/8187 cut-off events. [2023-11-29 06:58:08,746 INFO L125 PetriNetUnfolderBase]: For 7467/8023 co-relation queries the response was YES. [2023-11-29 06:58:08,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21023 conditions, 8187 events. 5089/8187 cut-off events. For 7467/8023 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 56771 event pairs, 4410 based on Foata normal form. 0/5493 useless extension candidates. Maximal degree in co-relation 20981. Up to 7067 conditions per place. [2023-11-29 06:58:08,785 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 51 selfloop transitions, 2 changer transitions 26/99 dead transitions. [2023-11-29 06:58:08,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 547 flow [2023-11-29 06:58:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:58:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:58:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2023-11-29 06:58:08,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2023-11-29 06:58:08,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 183 transitions. [2023-11-29 06:58:08,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 183 transitions. [2023-11-29 06:58:08,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:08,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 183 transitions. [2023-11-29 06:58:08,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:08,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:08,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:08,789 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 325 flow. Second operand 5 states and 183 transitions. [2023-11-29 06:58:08,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 547 flow [2023-11-29 06:58:08,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 532 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 06:58:08,793 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 292 flow [2023-11-29 06:58:08,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2023-11-29 06:58:08,794 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2023-11-29 06:58:08,794 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 292 flow [2023-11-29 06:58:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:08,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:08,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:08,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:58:08,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:08,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843208, now seen corresponding path program 1 times [2023-11-29 06:58:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341229903] [2023-11-29 06:58:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:09,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341229903] [2023-11-29 06:58:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341229903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305861245] [2023-11-29 06:58:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:09,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:09,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:09,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:09,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:58:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:09,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:58:09,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:09,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:58:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:09,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:09,263 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 06:58:09,267 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 06:58:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:09,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305861245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:09,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:09,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 06:58:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949572573] [2023-11-29 06:58:09,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:09,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:09,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:09,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-29 06:58:09,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 292 flow. Second operand has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:09,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:09,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-29 06:58:09,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:10,868 INFO L124 PetriNetUnfolderBase]: 7413/13029 cut-off events. [2023-11-29 06:58:10,868 INFO L125 PetriNetUnfolderBase]: For 9266/10369 co-relation queries the response was YES. [2023-11-29 06:58:10,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31826 conditions, 13029 events. 7413/13029 cut-off events. For 9266/10369 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 104385 event pairs, 2291 based on Foata normal form. 0/8858 useless extension candidates. Maximal degree in co-relation 31797. Up to 3890 conditions per place. [2023-11-29 06:58:10,934 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 91 selfloop transitions, 15 changer transitions 0/127 dead transitions. [2023-11-29 06:58:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 728 flow [2023-11-29 06:58:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:58:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:58:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2023-11-29 06:58:10,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017857142857143 [2023-11-29 06:58:10,936 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 281 transitions. [2023-11-29 06:58:10,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 281 transitions. [2023-11-29 06:58:10,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:10,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 281 transitions. [2023-11-29 06:58:10,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.125) internal successors, (281), 8 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:10,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:10,939 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:10,939 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 292 flow. Second operand 8 states and 281 transitions. [2023-11-29 06:58:10,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 728 flow [2023-11-29 06:58:10,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 127 transitions, 688 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-11-29 06:58:10,952 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 339 flow [2023-11-29 06:58:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2023-11-29 06:58:10,953 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-11-29 06:58:10,953 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 339 flow [2023-11-29 06:58:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:10,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:10,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:10,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:58:11,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:58:11,154 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:11,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:11,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843211, now seen corresponding path program 1 times [2023-11-29 06:58:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:11,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610630268] [2023-11-29 06:58:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:11,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:58:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610630268] [2023-11-29 06:58:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610630268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:11,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:58:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951153989] [2023-11-29 06:58:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:58:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:58:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:11,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:58:11,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:11,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:11,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:58:11,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:13,544 INFO L124 PetriNetUnfolderBase]: 12087/20902 cut-off events. [2023-11-29 06:58:13,544 INFO L125 PetriNetUnfolderBase]: For 15977/15977 co-relation queries the response was YES. [2023-11-29 06:58:13,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54946 conditions, 20902 events. 12087/20902 cut-off events. For 15977/15977 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 177907 event pairs, 3860 based on Foata normal form. 0/15212 useless extension candidates. Maximal degree in co-relation 54910. Up to 11392 conditions per place. [2023-11-29 06:58:13,656 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 93 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-11-29 06:58:13,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 699 flow [2023-11-29 06:58:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:58:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:58:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 06:58:13,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619047619047619 [2023-11-29 06:58:13,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 06:58:13,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 06:58:13,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:13,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 06:58:13,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:13,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:13,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:13,659 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 339 flow. Second operand 3 states and 139 transitions. [2023-11-29 06:58:13,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 699 flow [2023-11-29 06:58:13,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 689 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:58:13,668 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 384 flow [2023-11-29 06:58:13,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-11-29 06:58:13,669 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-11-29 06:58:13,669 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 384 flow [2023-11-29 06:58:13,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:13,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:13,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 06:58:13,669 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:13,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843209, now seen corresponding path program 1 times [2023-11-29 06:58:13,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:13,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789438983] [2023-11-29 06:58:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789438983] [2023-11-29 06:58:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789438983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688675408] [2023-11-29 06:58:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:13,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:13,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:58:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:14,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:58:14,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:14,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:58:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:14,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:14,144 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 06:58:14,147 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 06:58:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:14,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688675408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:14,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:14,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 06:58:14,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911721973] [2023-11-29 06:58:14,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:58:14,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:58:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:58:14,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 70 [2023-11-29 06:58:14,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 384 flow. Second operand has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:14,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:14,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 70 [2023-11-29 06:58:14,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:16,247 INFO L124 PetriNetUnfolderBase]: 9445/16956 cut-off events. [2023-11-29 06:58:16,247 INFO L125 PetriNetUnfolderBase]: For 18402/18422 co-relation queries the response was YES. [2023-11-29 06:58:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47844 conditions, 16956 events. 9445/16956 cut-off events. For 18402/18422 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 147405 event pairs, 2487 based on Foata normal form. 0/14066 useless extension candidates. Maximal degree in co-relation 47808. Up to 4619 conditions per place. [2023-11-29 06:58:16,350 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 94 selfloop transitions, 16 changer transitions 0/133 dead transitions. [2023-11-29 06:58:16,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 814 flow [2023-11-29 06:58:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:58:16,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:58:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 280 transitions. [2023-11-29 06:58:16,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 06:58:16,352 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 280 transitions. [2023-11-29 06:58:16,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 280 transitions. [2023-11-29 06:58:16,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:16,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 280 transitions. [2023-11-29 06:58:16,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.0) internal successors, (280), 8 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:16,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:16,354 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 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 06:58:16,354 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 384 flow. Second operand 8 states and 280 transitions. [2023-11-29 06:58:16,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 814 flow [2023-11-29 06:58:16,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 798 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:58:16,379 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 400 flow [2023-11-29 06:58:16,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=400, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2023-11-29 06:58:16,380 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2023-11-29 06:58:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 400 flow [2023-11-29 06:58:16,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.818181818181817) internal successors, (284), 11 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:16,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:16,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:16,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:58:16,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:16,581 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:16,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:16,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1590843212, now seen corresponding path program 1 times [2023-11-29 06:58:16,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:16,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881936507] [2023-11-29 06:58:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:16,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:58:16,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:16,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881936507] [2023-11-29 06:58:16,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881936507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:16,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:16,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:58:16,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100445373] [2023-11-29 06:58:16,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:16,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:58:16,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:58:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:58:16,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:58:16,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:16,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:16,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:58:16,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:18,672 INFO L124 PetriNetUnfolderBase]: 10790/19021 cut-off events. [2023-11-29 06:58:18,672 INFO L125 PetriNetUnfolderBase]: For 23799/23829 co-relation queries the response was YES. [2023-11-29 06:58:18,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55232 conditions, 19021 events. 10790/19021 cut-off events. For 23799/23829 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 162264 event pairs, 2153 based on Foata normal form. 256/15643 useless extension candidates. Maximal degree in co-relation 55194. Up to 13294 conditions per place. [2023-11-29 06:58:18,780 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 89 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-11-29 06:58:18,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 708 flow [2023-11-29 06:58:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:58:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:58:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-29 06:58:18,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-29 06:58:18,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-29 06:58:18,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-29 06:58:18,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:18,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-29 06:58:18,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:18,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:18,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:18,783 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 400 flow. Second operand 3 states and 133 transitions. [2023-11-29 06:58:18,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 708 flow [2023-11-29 06:58:18,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 693 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 06:58:18,791 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 412 flow [2023-11-29 06:58:18,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-11-29 06:58:18,792 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 23 predicate places. [2023-11-29 06:58:18,792 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 412 flow [2023-11-29 06:58:18,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:18,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:18,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:18,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:58:18,793 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:18,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1212427316, now seen corresponding path program 1 times [2023-11-29 06:58:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:18,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491573573] [2023-11-29 06:58:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:18,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:58:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491573573] [2023-11-29 06:58:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491573573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136878671] [2023-11-29 06:58:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:18,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:18,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:18,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 06:58:18,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:18,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:18,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 06:58:18,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:21,490 INFO L124 PetriNetUnfolderBase]: 12533/20273 cut-off events. [2023-11-29 06:58:21,490 INFO L125 PetriNetUnfolderBase]: For 23359/23425 co-relation queries the response was YES. [2023-11-29 06:58:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60725 conditions, 20273 events. 12533/20273 cut-off events. For 23359/23425 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 160069 event pairs, 8561 based on Foata normal form. 698/16841 useless extension candidates. Maximal degree in co-relation 60688. Up to 14637 conditions per place. [2023-11-29 06:58:21,614 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 118 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2023-11-29 06:58:21,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 144 transitions, 938 flow [2023-11-29 06:58:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:58:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 173 transitions. [2023-11-29 06:58:21,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2023-11-29 06:58:21,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 173 transitions. [2023-11-29 06:58:21,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 173 transitions. [2023-11-29 06:58:21,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:21,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 173 transitions. [2023-11-29 06:58:21,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:21,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:21,617 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:21,617 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 412 flow. Second operand 4 states and 173 transitions. [2023-11-29 06:58:21,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 144 transitions, 938 flow [2023-11-29 06:58:21,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 144 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:58:21,630 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 430 flow [2023-11-29 06:58:21,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2023-11-29 06:58:21,630 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 27 predicate places. [2023-11-29 06:58:21,630 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 430 flow [2023-11-29 06:58:21,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:21,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:21,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 06:58:21,631 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:21,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -222742074, now seen corresponding path program 1 times [2023-11-29 06:58:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18672369] [2023-11-29 06:58:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:21,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:21,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18672369] [2023-11-29 06:58:21,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18672369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075411906] [2023-11-29 06:58:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:21,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:21,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:21,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:58:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:22,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:58:22,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:22,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:58:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:22,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:22,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 06:58:22,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-29 06:58:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075411906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:22,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:22,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 06:58:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554584025] [2023-11-29 06:58:22,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:58:22,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:58:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:58:22,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 06:58:22,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 430 flow. Second operand has 20 states, 20 states have (on average 22.8) internal successors, (456), 20 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:22,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:22,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 06:58:22,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:31,676 INFO L124 PetriNetUnfolderBase]: 36283/60784 cut-off events. [2023-11-29 06:58:31,677 INFO L125 PetriNetUnfolderBase]: For 90778/90960 co-relation queries the response was YES. [2023-11-29 06:58:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188238 conditions, 60784 events. 36283/60784 cut-off events. For 90778/90960 co-relation queries the response was YES. Maximal size of possible extension queue 2886. Compared 571749 event pairs, 12996 based on Foata normal form. 182/47601 useless extension candidates. Maximal degree in co-relation 188198. Up to 8295 conditions per place. [2023-11-29 06:58:32,118 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 303 selfloop transitions, 37 changer transitions 0/364 dead transitions. [2023-11-29 06:58:32,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 364 transitions, 2643 flow [2023-11-29 06:58:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:58:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:58:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 573 transitions. [2023-11-29 06:58:32,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457142857142857 [2023-11-29 06:58:32,122 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 573 transitions. [2023-11-29 06:58:32,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 573 transitions. [2023-11-29 06:58:32,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:32,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 573 transitions. [2023-11-29 06:58:32,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 38.2) internal successors, (573), 15 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:32,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 70.0) internal successors, (1120), 16 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:32,127 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 70.0) internal successors, (1120), 16 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:32,127 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 430 flow. Second operand 15 states and 573 transitions. [2023-11-29 06:58:32,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 364 transitions, 2643 flow [2023-11-29 06:58:32,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 364 transitions, 2589 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:58:32,164 INFO L231 Difference]: Finished difference. Result has 114 places, 115 transitions, 637 flow [2023-11-29 06:58:32,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=637, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2023-11-29 06:58:32,165 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 43 predicate places. [2023-11-29 06:58:32,165 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 637 flow [2023-11-29 06:58:32,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.8) internal successors, (456), 20 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:32,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:32,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:32,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:58:32,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:58:32,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:32,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash -222742073, now seen corresponding path program 1 times [2023-11-29 06:58:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354137441] [2023-11-29 06:58:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:32,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354137441] [2023-11-29 06:58:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354137441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:32,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154608635] [2023-11-29 06:58:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:32,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:32,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:58:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:32,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:58:32,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:32,822 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 23 treesize of output 1 [2023-11-29 06:58:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:33,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:33,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-29 06:58:33,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-29 06:58:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:58:33,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154608635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:33,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 06:58:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026721222] [2023-11-29 06:58:33,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:58:33,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:58:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:58:33,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 06:58:33,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 637 flow. Second operand has 20 states, 20 states have (on average 22.8) internal successors, (456), 20 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:33,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:33,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 06:58:33,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:43,244 INFO L124 PetriNetUnfolderBase]: 35140/59239 cut-off events. [2023-11-29 06:58:43,244 INFO L125 PetriNetUnfolderBase]: For 87130/87312 co-relation queries the response was YES. [2023-11-29 06:58:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199684 conditions, 59239 events. 35140/59239 cut-off events. For 87130/87312 co-relation queries the response was YES. Maximal size of possible extension queue 2812. Compared 559304 event pairs, 12996 based on Foata normal form. 182/48634 useless extension candidates. Maximal degree in co-relation 199636. Up to 8284 conditions per place. [2023-11-29 06:58:43,706 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 301 selfloop transitions, 37 changer transitions 0/362 dead transitions. [2023-11-29 06:58:43,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 362 transitions, 2724 flow [2023-11-29 06:58:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:58:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:58:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 571 transitions. [2023-11-29 06:58:43,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438095238095239 [2023-11-29 06:58:43,709 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 571 transitions. [2023-11-29 06:58:43,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 571 transitions. [2023-11-29 06:58:43,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:43,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 571 transitions. [2023-11-29 06:58:43,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 38.06666666666667) internal successors, (571), 15 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:43,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 70.0) internal successors, (1120), 16 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:43,714 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 70.0) internal successors, (1120), 16 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:43,714 INFO L175 Difference]: Start difference. First operand has 114 places, 115 transitions, 637 flow. Second operand 15 states and 571 transitions. [2023-11-29 06:58:43,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 362 transitions, 2724 flow [2023-11-29 06:58:44,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 362 transitions, 2715 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:58:44,004 INFO L231 Difference]: Finished difference. Result has 124 places, 115 transitions, 706 flow [2023-11-29 06:58:44,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=706, PETRI_PLACES=124, PETRI_TRANSITIONS=115} [2023-11-29 06:58:44,005 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 53 predicate places. [2023-11-29 06:58:44,005 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 115 transitions, 706 flow [2023-11-29 06:58:44,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.8) internal successors, (456), 20 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:44,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:44,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:44,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:58:44,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:58:44,206 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:44,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2141858502, now seen corresponding path program 1 times [2023-11-29 06:58:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:44,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706273509] [2023-11-29 06:58:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:44,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:58:44,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:44,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706273509] [2023-11-29 06:58:44,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706273509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:58:44,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:58:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:58:44,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226952814] [2023-11-29 06:58:44,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:58:44,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:58:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:58:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:58:44,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 06:58:44,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 115 transitions, 706 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:44,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:44,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 06:58:44,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:58:54,030 INFO L124 PetriNetUnfolderBase]: 39899/65060 cut-off events. [2023-11-29 06:58:54,030 INFO L125 PetriNetUnfolderBase]: For 124176/126096 co-relation queries the response was YES. [2023-11-29 06:58:54,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227582 conditions, 65060 events. 39899/65060 cut-off events. For 124176/126096 co-relation queries the response was YES. Maximal size of possible extension queue 2907. Compared 593063 event pairs, 21488 based on Foata normal form. 2378/58707 useless extension candidates. Maximal degree in co-relation 227533. Up to 39994 conditions per place. [2023-11-29 06:58:54,548 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 184 selfloop transitions, 4 changer transitions 0/213 dead transitions. [2023-11-29 06:58:54,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 1687 flow [2023-11-29 06:58:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:58:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:58:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2023-11-29 06:58:54,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-29 06:58:54,549 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 175 transitions. [2023-11-29 06:58:54,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 175 transitions. [2023-11-29 06:58:54,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:58:54,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 175 transitions. [2023-11-29 06:58:54,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:54,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:54,551 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:54,551 INFO L175 Difference]: Start difference. First operand has 124 places, 115 transitions, 706 flow. Second operand 4 states and 175 transitions. [2023-11-29 06:58:54,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 1687 flow [2023-11-29 06:58:55,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 213 transitions, 1619 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-29 06:58:55,315 INFO L231 Difference]: Finished difference. Result has 120 places, 116 transitions, 691 flow [2023-11-29 06:58:55,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=691, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2023-11-29 06:58:55,316 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 49 predicate places. [2023-11-29 06:58:55,316 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 691 flow [2023-11-29 06:58:55,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:55,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:55,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:58:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 06:58:55,317 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:58:55,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1253650877, now seen corresponding path program 1 times [2023-11-29 06:58:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:55,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328600861] [2023-11-29 06:58:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:55,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:55,451 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 06:58:55,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328600861] [2023-11-29 06:58:55,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328600861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:55,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137300467] [2023-11-29 06:58:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:55,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:55,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:55,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:58:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:55,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:58:55,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:55,685 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 06:58:55,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:55,765 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 06:58:55,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137300467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:55,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:55,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 06:58:55,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322361716] [2023-11-29 06:58:55,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:55,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:58:55,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:58:55,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:58:55,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 06:58:55,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 691 flow. Second operand has 20 states, 20 states have (on average 19.55) internal successors, (391), 20 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:58:55,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:55,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 06:58:55,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:05,600 INFO L124 PetriNetUnfolderBase]: 37605/59324 cut-off events. [2023-11-29 06:59:05,600 INFO L125 PetriNetUnfolderBase]: For 134961/138493 co-relation queries the response was YES. [2023-11-29 06:59:05,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217016 conditions, 59324 events. 37605/59324 cut-off events. For 134961/138493 co-relation queries the response was YES. Maximal size of possible extension queue 2462. Compared 507692 event pairs, 26992 based on Foata normal form. 994/52415 useless extension candidates. Maximal degree in co-relation 216967. Up to 40661 conditions per place. [2023-11-29 06:59:06,106 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 215 selfloop transitions, 16 changer transitions 0/254 dead transitions. [2023-11-29 06:59:06,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 254 transitions, 1983 flow [2023-11-29 06:59:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:59:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:59:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2023-11-29 06:59:06,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-29 06:59:06,107 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 325 transitions. [2023-11-29 06:59:06,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 325 transitions. [2023-11-29 06:59:06,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:06,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 325 transitions. [2023-11-29 06:59:06,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 32.5) internal successors, (325), 10 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:06,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:06,109 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:06,109 INFO L175 Difference]: Start difference. First operand has 120 places, 116 transitions, 691 flow. Second operand 10 states and 325 transitions. [2023-11-29 06:59:06,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 254 transitions, 1983 flow [2023-11-29 06:59:06,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 254 transitions, 1953 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:59:06,297 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 774 flow [2023-11-29 06:59:06,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=774, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2023-11-29 06:59:06,297 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 60 predicate places. [2023-11-29 06:59:06,297 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 774 flow [2023-11-29 06:59:06,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.55) internal successors, (391), 20 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:06,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:06,298 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 06:59:06,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:59:06,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:59:06,498 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:59:06,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:06,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1397340655, now seen corresponding path program 2 times [2023-11-29 06:59:06,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:06,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224445761] [2023-11-29 06:59:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:06,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:06,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:06,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224445761] [2023-11-29 06:59:06,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224445761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:06,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124716425] [2023-11-29 06:59:06,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:59:06,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:06,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:06,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:59:06,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:59:06,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:06,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:59:06,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 06:59:06,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 06:59:06,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124716425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:06,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:06,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 06:59:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333765897] [2023-11-29 06:59:06,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:59:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:59:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:59:06,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:59:06,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 774 flow. Second operand has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:06,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:06,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:59:06,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:13,137 INFO L124 PetriNetUnfolderBase]: 26099/43335 cut-off events. [2023-11-29 06:59:13,137 INFO L125 PetriNetUnfolderBase]: For 108485/110724 co-relation queries the response was YES. [2023-11-29 06:59:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161592 conditions, 43335 events. 26099/43335 cut-off events. For 108485/110724 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 390521 event pairs, 21349 based on Foata normal form. 672/37565 useless extension candidates. Maximal degree in co-relation 161520. Up to 36918 conditions per place. [2023-11-29 06:59:13,571 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 76 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2023-11-29 06:59:13,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 123 transitions, 984 flow [2023-11-29 06:59:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:59:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:59:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 362 transitions. [2023-11-29 06:59:13,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693877551020408 [2023-11-29 06:59:13,573 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 362 transitions. [2023-11-29 06:59:13,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 362 transitions. [2023-11-29 06:59:13,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:13,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 362 transitions. [2023-11-29 06:59:13,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.857142857142858) internal successors, (362), 14 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:13,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:13,578 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:13,578 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 774 flow. Second operand 14 states and 362 transitions. [2023-11-29 06:59:13,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 123 transitions, 984 flow [2023-11-29 06:59:13,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 123 transitions, 934 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-29 06:59:13,731 INFO L231 Difference]: Finished difference. Result has 133 places, 123 transitions, 782 flow [2023-11-29 06:59:13,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=782, PETRI_PLACES=133, PETRI_TRANSITIONS=123} [2023-11-29 06:59:13,731 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 62 predicate places. [2023-11-29 06:59:13,731 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 782 flow [2023-11-29 06:59:13,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:13,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:13,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:13,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:59:13,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:13,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:59:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash 16354712, now seen corresponding path program 1 times [2023-11-29 06:59:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:13,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847915126] [2023-11-29 06:59:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:13,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:59:13,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847915126] [2023-11-29 06:59:13,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847915126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:13,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:59:13,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:59:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16860272] [2023-11-29 06:59:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:13,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:59:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:59:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:59:14,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 06:59:14,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 123 transitions, 782 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:14,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:14,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 06:59:14,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:20,972 INFO L124 PetriNetUnfolderBase]: 31459/50942 cut-off events. [2023-11-29 06:59:20,972 INFO L125 PetriNetUnfolderBase]: For 121556/123410 co-relation queries the response was YES. [2023-11-29 06:59:21,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188424 conditions, 50942 events. 31459/50942 cut-off events. For 121556/123410 co-relation queries the response was YES. Maximal size of possible extension queue 2259. Compared 448657 event pairs, 5573 based on Foata normal form. 1878/47852 useless extension candidates. Maximal degree in co-relation 133400. Up to 27857 conditions per place. [2023-11-29 06:59:21,476 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 146 selfloop transitions, 16 changer transitions 0/188 dead transitions. [2023-11-29 06:59:21,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 188 transitions, 1544 flow [2023-11-29 06:59:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:59:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:59:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2023-11-29 06:59:21,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2023-11-29 06:59:21,478 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 188 transitions. [2023-11-29 06:59:21,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 188 transitions. [2023-11-29 06:59:21,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:21,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 188 transitions. [2023-11-29 06:59:21,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.6) internal successors, (188), 5 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 06:59:21,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:21,480 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:21,480 INFO L175 Difference]: Start difference. First operand has 133 places, 123 transitions, 782 flow. Second operand 5 states and 188 transitions. [2023-11-29 06:59:21,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 188 transitions, 1544 flow [2023-11-29 06:59:21,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 188 transitions, 1478 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-29 06:59:21,665 INFO L231 Difference]: Finished difference. Result has 124 places, 122 transitions, 746 flow [2023-11-29 06:59:21,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=746, PETRI_PLACES=124, PETRI_TRANSITIONS=122} [2023-11-29 06:59:21,666 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 53 predicate places. [2023-11-29 06:59:21,666 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 122 transitions, 746 flow [2023-11-29 06:59:21,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:21,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:21,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:21,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 06:59:21,667 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:59:21,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1820782227, now seen corresponding path program 1 times [2023-11-29 06:59:21,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:21,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761387918] [2023-11-29 06:59:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:21,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:21,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761387918] [2023-11-29 06:59:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761387918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:21,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950859570] [2023-11-29 06:59:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:21,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:21,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:21,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:21,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:59:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:21,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:59:21,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:22,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:22,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950859570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:22,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:22,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-11-29 06:59:22,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058048622] [2023-11-29 06:59:22,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:22,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:59:22,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:59:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:59:22,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2023-11-29 06:59:22,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 122 transitions, 746 flow. Second operand has 20 states, 20 states have (on average 21.6) internal successors, (432), 20 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:22,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:22,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2023-11-29 06:59:22,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:30,667 INFO L124 PetriNetUnfolderBase]: 34653/57364 cut-off events. [2023-11-29 06:59:30,667 INFO L125 PetriNetUnfolderBase]: For 135259/136733 co-relation queries the response was YES. [2023-11-29 06:59:30,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213519 conditions, 57364 events. 34653/57364 cut-off events. For 135259/136733 co-relation queries the response was YES. Maximal size of possible extension queue 2393. Compared 506924 event pairs, 22580 based on Foata normal form. 813/52579 useless extension candidates. Maximal degree in co-relation 151124. Up to 35687 conditions per place. [2023-11-29 06:59:31,213 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 207 selfloop transitions, 22 changer transitions 3/256 dead transitions. [2023-11-29 06:59:31,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 256 transitions, 2006 flow [2023-11-29 06:59:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:59:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:59:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 409 transitions. [2023-11-29 06:59:31,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869047619047619 [2023-11-29 06:59:31,215 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 409 transitions. [2023-11-29 06:59:31,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 409 transitions. [2023-11-29 06:59:31,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:31,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 409 transitions. [2023-11-29 06:59:31,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 34.083333333333336) internal successors, (409), 12 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:31,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 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 06:59:31,218 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 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 06:59:31,218 INFO L175 Difference]: Start difference. First operand has 124 places, 122 transitions, 746 flow. Second operand 12 states and 409 transitions. [2023-11-29 06:59:31,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 256 transitions, 2006 flow [2023-11-29 06:59:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 256 transitions, 1938 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:59:31,325 INFO L231 Difference]: Finished difference. Result has 137 places, 131 transitions, 855 flow [2023-11-29 06:59:31,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=855, PETRI_PLACES=137, PETRI_TRANSITIONS=131} [2023-11-29 06:59:31,326 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 66 predicate places. [2023-11-29 06:59:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 131 transitions, 855 flow [2023-11-29 06:59:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.6) internal successors, (432), 20 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:31,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:31,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:31,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:59:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:31,527 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:59:31,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash 483146279, now seen corresponding path program 2 times [2023-11-29 06:59:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:31,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701839447] [2023-11-29 06:59:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:31,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701839447] [2023-11-29 06:59:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701839447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983476756] [2023-11-29 06:59:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:59:31,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:31,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:31,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:59:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:59:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:31,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:59:31,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:59:31,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:59:31,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983476756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:31,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:59:31,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2023-11-29 06:59:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807369257] [2023-11-29 06:59:31,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:31,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:59:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:59:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:59:31,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:59:31,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 131 transitions, 855 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:31,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:31,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:59:31,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:41,426 INFO L124 PetriNetUnfolderBase]: 38536/64377 cut-off events. [2023-11-29 06:59:41,426 INFO L125 PetriNetUnfolderBase]: For 175037/179562 co-relation queries the response was YES. [2023-11-29 06:59:41,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239421 conditions, 64377 events. 38536/64377 cut-off events. For 175037/179562 co-relation queries the response was YES. Maximal size of possible extension queue 2701. Compared 592592 event pairs, 6476 based on Foata normal form. 1180/61495 useless extension candidates. Maximal degree in co-relation 179527. Up to 22815 conditions per place. [2023-11-29 06:59:41,978 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 230 selfloop transitions, 20 changer transitions 2/275 dead transitions. [2023-11-29 06:59:41,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 275 transitions, 2323 flow [2023-11-29 06:59:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:59:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:59:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2023-11-29 06:59:41,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6514285714285715 [2023-11-29 06:59:41,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 228 transitions. [2023-11-29 06:59:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 228 transitions. [2023-11-29 06:59:41,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:41,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 228 transitions. [2023-11-29 06:59:41,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:41,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:41,981 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:41,981 INFO L175 Difference]: Start difference. First operand has 137 places, 131 transitions, 855 flow. Second operand 5 states and 228 transitions. [2023-11-29 06:59:41,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 275 transitions, 2323 flow [2023-11-29 06:59:42,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 275 transitions, 2308 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:59:42,068 INFO L231 Difference]: Finished difference. Result has 141 places, 143 transitions, 1033 flow [2023-11-29 06:59:42,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1033, PETRI_PLACES=141, PETRI_TRANSITIONS=143} [2023-11-29 06:59:42,068 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 70 predicate places. [2023-11-29 06:59:42,068 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 143 transitions, 1033 flow [2023-11-29 06:59:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:42,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:42,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:42,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:59:42,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:42,269 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:59:42,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 994711468, now seen corresponding path program 1 times [2023-11-29 06:59:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:42,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827132749] [2023-11-29 06:59:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:42,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:42,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827132749] [2023-11-29 06:59:42,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827132749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296705135] [2023-11-29 06:59:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:42,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:42,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:42,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:59:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:42,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:59:42,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:42,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:59:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:42,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296705135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:59:42,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:59:42,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 06:59:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479147647] [2023-11-29 06:59:42,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:59:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:59:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:59:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:59:42,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2023-11-29 06:59:42,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 143 transitions, 1033 flow. Second operand has 21 states, 21 states have (on average 21.571428571428573) internal successors, (453), 21 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:42,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:42,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2023-11-29 06:59:42,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:55,294 INFO L124 PetriNetUnfolderBase]: 46138/75639 cut-off events. [2023-11-29 06:59:55,295 INFO L125 PetriNetUnfolderBase]: For 257043/259778 co-relation queries the response was YES. [2023-11-29 06:59:55,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305868 conditions, 75639 events. 46138/75639 cut-off events. For 257043/259778 co-relation queries the response was YES. Maximal size of possible extension queue 2909. Compared 678321 event pairs, 32471 based on Foata normal form. 1085/71436 useless extension candidates. Maximal degree in co-relation 220600. Up to 44944 conditions per place. [2023-11-29 06:59:56,038 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 198 selfloop transitions, 29 changer transitions 0/256 dead transitions. [2023-11-29 06:59:56,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 256 transitions, 2292 flow [2023-11-29 06:59:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:59:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:59:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 371 transitions. [2023-11-29 06:59:56,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2023-11-29 06:59:56,040 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 371 transitions. [2023-11-29 06:59:56,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 371 transitions. [2023-11-29 06:59:56,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:56,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 371 transitions. [2023-11-29 06:59:56,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 33.72727272727273) internal successors, (371), 11 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:56,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:56,042 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:56,042 INFO L175 Difference]: Start difference. First operand has 141 places, 143 transitions, 1033 flow. Second operand 11 states and 371 transitions. [2023-11-29 06:59:56,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 256 transitions, 2292 flow [2023-11-29 06:59:57,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 256 transitions, 2292 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:59:57,419 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 1231 flow [2023-11-29 06:59:57,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1231, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2023-11-29 06:59:57,419 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 84 predicate places. [2023-11-29 06:59:57,419 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 1231 flow [2023-11-29 06:59:57,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.571428571428573) internal successors, (453), 21 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:57,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:59:57,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:59:57,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:59:57,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:57,620 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 06:59:57,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:59:57,621 INFO L85 PathProgramCache]: Analyzing trace with hash 483146280, now seen corresponding path program 2 times [2023-11-29 06:59:57,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:59:57,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920343761] [2023-11-29 06:59:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:59:57,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:59:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:59:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:59:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:59:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920343761] [2023-11-29 06:59:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920343761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:59:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444280316] [2023-11-29 06:59:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:59:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:59:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:59:57,732 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:59:57,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:59:57,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:59:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:59:57,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:59:57,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:59:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:59:57,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:59:57,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444280316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:59:57,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:59:57,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2023-11-29 06:59:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999553593] [2023-11-29 06:59:57,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:59:57,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:59:57,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:59:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:59:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:59:57,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 06:59:57,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 1231 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:59:57,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:59:57,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 06:59:57,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:00:09,738 INFO L124 PetriNetUnfolderBase]: 40509/70048 cut-off events. [2023-11-29 07:00:09,739 INFO L125 PetriNetUnfolderBase]: For 279272/285478 co-relation queries the response was YES. [2023-11-29 07:00:10,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279307 conditions, 70048 events. 40509/70048 cut-off events. For 279272/285478 co-relation queries the response was YES. Maximal size of possible extension queue 2738. Compared 673731 event pairs, 5996 based on Foata normal form. 3381/71154 useless extension candidates. Maximal degree in co-relation 207453. Up to 21460 conditions per place. [2023-11-29 07:00:10,610 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 244 selfloop transitions, 25 changer transitions 2/295 dead transitions. [2023-11-29 07:00:10,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 295 transitions, 2834 flow [2023-11-29 07:00:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:00:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 07:00:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2023-11-29 07:00:10,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542857142857142 [2023-11-29 07:00:10,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 229 transitions. [2023-11-29 07:00:10,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 229 transitions. [2023-11-29 07:00:10,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:00:10,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 229 transitions. [2023-11-29 07:00:10,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:10,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:10,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:10,613 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 1231 flow. Second operand 5 states and 229 transitions. [2023-11-29 07:00:10,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 295 transitions, 2834 flow [2023-11-29 07:00:11,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 295 transitions, 2765 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-29 07:00:11,479 INFO L231 Difference]: Finished difference. Result has 156 places, 160 transitions, 1382 flow [2023-11-29 07:00:11,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1382, PETRI_PLACES=156, PETRI_TRANSITIONS=160} [2023-11-29 07:00:11,479 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 85 predicate places. [2023-11-29 07:00:11,479 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 160 transitions, 1382 flow [2023-11-29 07:00:11,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:11,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:11,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:11,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 07:00:11,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:11,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:00:11,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash 506197305, now seen corresponding path program 1 times [2023-11-29 07:00:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:11,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621065016] [2023-11-29 07:00:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:11,792 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 07:00:11,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621065016] [2023-11-29 07:00:11,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621065016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632319035] [2023-11-29 07:00:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:11,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:11,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:11,793 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:11,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 07:00:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:11,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:00:11,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:12,019 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 07:00:12,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:00:12,101 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 07:00:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632319035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:00:12,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:00:12,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 07:00:12,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168162229] [2023-11-29 07:00:12,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:00:12,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 07:00:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 07:00:12,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-29 07:00:12,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2023-11-29 07:00:12,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 160 transitions, 1382 flow. Second operand has 19 states, 19 states have (on average 21.63157894736842) internal successors, (411), 19 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:12,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:12,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2023-11-29 07:00:12,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:00:24,728 INFO L124 PetriNetUnfolderBase]: 45294/75891 cut-off events. [2023-11-29 07:00:24,728 INFO L125 PetriNetUnfolderBase]: For 334121/337413 co-relation queries the response was YES. [2023-11-29 07:00:25,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321103 conditions, 75891 events. 45294/75891 cut-off events. For 334121/337413 co-relation queries the response was YES. Maximal size of possible extension queue 2782. Compared 696045 event pairs, 27163 based on Foata normal form. 1392/71954 useless extension candidates. Maximal degree in co-relation 285426. Up to 44638 conditions per place. [2023-11-29 07:00:25,610 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 226 selfloop transitions, 30 changer transitions 2/290 dead transitions. [2023-11-29 07:00:25,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 290 transitions, 2906 flow [2023-11-29 07:00:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 07:00:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 07:00:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 399 transitions. [2023-11-29 07:00:25,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-29 07:00:25,612 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 399 transitions. [2023-11-29 07:00:25,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 399 transitions. [2023-11-29 07:00:25,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:00:25,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 399 transitions. [2023-11-29 07:00:25,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 33.25) internal successors, (399), 12 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:25,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 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 07:00:25,613 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 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 07:00:25,613 INFO L175 Difference]: Start difference. First operand has 156 places, 160 transitions, 1382 flow. Second operand 12 states and 399 transitions. [2023-11-29 07:00:25,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 290 transitions, 2906 flow [2023-11-29 07:00:26,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 290 transitions, 2906 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 07:00:26,851 INFO L231 Difference]: Finished difference. Result has 171 places, 165 transitions, 1533 flow [2023-11-29 07:00:26,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1533, PETRI_PLACES=171, PETRI_TRANSITIONS=165} [2023-11-29 07:00:26,852 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 100 predicate places. [2023-11-29 07:00:26,852 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 165 transitions, 1533 flow [2023-11-29 07:00:26,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.63157894736842) internal successors, (411), 19 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:26,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:26,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:26,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 07:00:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:27,053 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:00:27,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 755468222, now seen corresponding path program 1 times [2023-11-29 07:00:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:27,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968653037] [2023-11-29 07:00:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:27,199 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 07:00:27,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:27,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968653037] [2023-11-29 07:00:27,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968653037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:27,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762104183] [2023-11-29 07:00:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:27,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:27,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:27,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 07:00:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:27,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:00:27,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:27,416 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 07:00:27,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:00:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:00:27,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762104183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:00:27,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:00:27,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 07:00:27,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422476565] [2023-11-29 07:00:27,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:00:27,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 07:00:27,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:27,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 07:00:27,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:00:27,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 70 [2023-11-29 07:00:27,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 165 transitions, 1533 flow. Second operand has 21 states, 21 states have (on average 21.666666666666668) internal successors, (455), 21 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:27,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:27,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 70 [2023-11-29 07:00:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:00:40,199 INFO L124 PetriNetUnfolderBase]: 43410/72535 cut-off events. [2023-11-29 07:00:40,199 INFO L125 PetriNetUnfolderBase]: For 330931/333942 co-relation queries the response was YES. [2023-11-29 07:00:40,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308837 conditions, 72535 events. 43410/72535 cut-off events. For 330931/333942 co-relation queries the response was YES. Maximal size of possible extension queue 2705. Compared 657731 event pairs, 32809 based on Foata normal form. 1266/68778 useless extension candidates. Maximal degree in co-relation 302067. Up to 44638 conditions per place. [2023-11-29 07:00:41,264 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 193 selfloop transitions, 33 changer transitions 3/261 dead transitions. [2023-11-29 07:00:41,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 261 transitions, 2703 flow [2023-11-29 07:00:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 07:00:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 07:00:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 364 transitions. [2023-11-29 07:00:41,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2023-11-29 07:00:41,266 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 364 transitions. [2023-11-29 07:00:41,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 364 transitions. [2023-11-29 07:00:41,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:00:41,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 364 transitions. [2023-11-29 07:00:41,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 33.09090909090909) internal successors, (364), 11 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:41,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:41,270 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:41,270 INFO L175 Difference]: Start difference. First operand has 171 places, 165 transitions, 1533 flow. Second operand 11 states and 364 transitions. [2023-11-29 07:00:41,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 261 transitions, 2703 flow [2023-11-29 07:00:42,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 261 transitions, 2662 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-29 07:00:42,286 INFO L231 Difference]: Finished difference. Result has 178 places, 166 transitions, 1594 flow [2023-11-29 07:00:42,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1594, PETRI_PLACES=178, PETRI_TRANSITIONS=166} [2023-11-29 07:00:42,287 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 107 predicate places. [2023-11-29 07:00:42,287 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 166 transitions, 1594 flow [2023-11-29 07:00:42,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.666666666666668) internal successors, (455), 21 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:42,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:42,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:42,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 07:00:42,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:42,488 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:00:42,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2133254, now seen corresponding path program 2 times [2023-11-29 07:00:42,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:42,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289076966] [2023-11-29 07:00:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:42,653 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 07:00:42,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:42,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289076966] [2023-11-29 07:00:42,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289076966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:42,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209657223] [2023-11-29 07:00:42,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:00:42,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:42,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:42,655 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:42,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 07:00:42,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 07:00:42,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:00:42,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:00:42,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:42,845 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 07:00:42,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:00:42,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209657223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:00:42,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:00:42,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2023-11-29 07:00:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645852705] [2023-11-29 07:00:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:00:42,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:00:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:00:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:00:42,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 07:00:42,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 166 transitions, 1594 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:42,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:42,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 07:00:42,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:00:51,977 INFO L124 PetriNetUnfolderBase]: 33840/58166 cut-off events. [2023-11-29 07:00:51,977 INFO L125 PetriNetUnfolderBase]: For 303706/309598 co-relation queries the response was YES. [2023-11-29 07:00:52,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244280 conditions, 58166 events. 33840/58166 cut-off events. For 303706/309598 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 541963 event pairs, 4459 based on Foata normal form. 2827/59105 useless extension candidates. Maximal degree in co-relation 237427. Up to 21635 conditions per place. [2023-11-29 07:00:52,716 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 233 selfloop transitions, 16 changer transitions 3/277 dead transitions. [2023-11-29 07:00:52,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 277 transitions, 2905 flow [2023-11-29 07:00:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:00:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 07:00:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2023-11-29 07:00:52,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485714285714286 [2023-11-29 07:00:52,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 227 transitions. [2023-11-29 07:00:52,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 227 transitions. [2023-11-29 07:00:52,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:00:52,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 227 transitions. [2023-11-29 07:00:52,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:52,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:52,719 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:52,719 INFO L175 Difference]: Start difference. First operand has 178 places, 166 transitions, 1594 flow. Second operand 5 states and 227 transitions. [2023-11-29 07:00:52,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 277 transitions, 2905 flow [2023-11-29 07:00:53,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 277 transitions, 2807 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-29 07:00:53,591 INFO L231 Difference]: Finished difference. Result has 175 places, 156 transitions, 1432 flow [2023-11-29 07:00:53,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1432, PETRI_PLACES=175, PETRI_TRANSITIONS=156} [2023-11-29 07:00:53,592 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 104 predicate places. [2023-11-29 07:00:53,592 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 156 transitions, 1432 flow [2023-11-29 07:00:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:53,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:53,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:53,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 07:00:53,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 07:00:53,793 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:00:53,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash 12881595, now seen corresponding path program 2 times [2023-11-29 07:00:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:53,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668587554] [2023-11-29 07:00:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:53,908 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 07:00:53,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:53,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668587554] [2023-11-29 07:00:53,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668587554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456726700] [2023-11-29 07:00:53,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:00:53,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:53,910 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:53,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 07:00:54,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 07:00:54,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:00:54,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:00:54,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:54,095 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 07:00:54,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:00:54,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456726700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:00:54,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:00:54,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2023-11-29 07:00:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821380070] [2023-11-29 07:00:54,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:00:54,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:00:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:00:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:00:54,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 70 [2023-11-29 07:00:54,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 156 transitions, 1432 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:00:54,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:54,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 70 [2023-11-29 07:00:54,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:01,754 INFO L124 PetriNetUnfolderBase]: 27782/48051 cut-off events. [2023-11-29 07:01:01,754 INFO L125 PetriNetUnfolderBase]: For 260266/265467 co-relation queries the response was YES. [2023-11-29 07:01:02,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203350 conditions, 48051 events. 27782/48051 cut-off events. For 260266/265467 co-relation queries the response was YES. Maximal size of possible extension queue 1885. Compared 441265 event pairs, 3551 based on Foata normal form. 2668/49343 useless extension candidates. Maximal degree in co-relation 197369. Up to 14611 conditions per place. [2023-11-29 07:01:02,323 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 214 selfloop transitions, 15 changer transitions 3/257 dead transitions. [2023-11-29 07:01:02,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 257 transitions, 2569 flow [2023-11-29 07:01:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:01:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 07:01:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2023-11-29 07:01:02,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2023-11-29 07:01:02,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 224 transitions. [2023-11-29 07:01:02,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 224 transitions. [2023-11-29 07:01:02,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:01:02,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 224 transitions. [2023-11-29 07:01:02,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:02,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:02,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:02,325 INFO L175 Difference]: Start difference. First operand has 175 places, 156 transitions, 1432 flow. Second operand 5 states and 224 transitions. [2023-11-29 07:01:02,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 257 transitions, 2569 flow [2023-11-29 07:01:03,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 257 transitions, 2505 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-29 07:01:03,075 INFO L231 Difference]: Finished difference. Result has 169 places, 138 transitions, 1161 flow [2023-11-29 07:01:03,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1161, PETRI_PLACES=169, PETRI_TRANSITIONS=138} [2023-11-29 07:01:03,076 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 98 predicate places. [2023-11-29 07:01:03,076 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 138 transitions, 1161 flow [2023-11-29 07:01:03,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:03,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:01:03,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:01:03,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 07:01:03,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:03,277 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:01:03,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2073362067, now seen corresponding path program 1 times [2023-11-29 07:01:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:03,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372460213] [2023-11-29 07:01:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:03,408 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 07:01:03,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372460213] [2023-11-29 07:01:03,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372460213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836469862] [2023-11-29 07:01:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:03,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:03,410 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:03,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 07:01:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:03,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 07:01:03,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:03,670 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 07:01:03,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:03,768 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 07:01:03,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836469862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:03,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:03,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 07:01:03,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102884214] [2023-11-29 07:01:03,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 07:01:03,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 07:01:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:01:03,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 07:01:03,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 138 transitions, 1161 flow. Second operand has 21 states, 21 states have (on average 19.714285714285715) internal successors, (414), 21 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:03,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:01:03,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 07:01:03,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:12,322 INFO L124 PetriNetUnfolderBase]: 31728/50296 cut-off events. [2023-11-29 07:01:12,322 INFO L125 PetriNetUnfolderBase]: For 209190/215229 co-relation queries the response was YES. [2023-11-29 07:01:12,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206676 conditions, 50296 events. 31728/50296 cut-off events. For 209190/215229 co-relation queries the response was YES. Maximal size of possible extension queue 1819. Compared 415976 event pairs, 23784 based on Foata normal form. 1052/48569 useless extension candidates. Maximal degree in co-relation 202317. Up to 37376 conditions per place. [2023-11-29 07:01:12,958 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 134 selfloop transitions, 26 changer transitions 32/220 dead transitions. [2023-11-29 07:01:12,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 2134 flow [2023-11-29 07:01:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:01:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 07:01:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2023-11-29 07:01:12,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-29 07:01:12,959 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 296 transitions. [2023-11-29 07:01:12,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 296 transitions. [2023-11-29 07:01:12,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:01:12,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 296 transitions. [2023-11-29 07:01:12,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.6) internal successors, (296), 10 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:12,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:12,961 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:12,961 INFO L175 Difference]: Start difference. First operand has 169 places, 138 transitions, 1161 flow. Second operand 10 states and 296 transitions. [2023-11-29 07:01:12,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 2134 flow [2023-11-29 07:01:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 220 transitions, 2080 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 07:01:13,319 INFO L231 Difference]: Finished difference. Result has 176 places, 130 transitions, 1073 flow [2023-11-29 07:01:13,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1073, PETRI_PLACES=176, PETRI_TRANSITIONS=130} [2023-11-29 07:01:13,320 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 105 predicate places. [2023-11-29 07:01:13,320 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 130 transitions, 1073 flow [2023-11-29 07:01:13,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.714285714285715) internal successors, (414), 21 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:13,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:01:13,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:01:13,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 07:01:13,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 07:01:13,521 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:01:13,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 506996973, now seen corresponding path program 1 times [2023-11-29 07:01:13,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:13,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356936013] [2023-11-29 07:01:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:13,610 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 07:01:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356936013] [2023-11-29 07:01:13,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356936013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657240077] [2023-11-29 07:01:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:13,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:13,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:13,612 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:13,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 07:01:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:13,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:01:13,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:13,874 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 07:01:13,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:13,987 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 07:01:13,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657240077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:13,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:13,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 07:01:13,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520301888] [2023-11-29 07:01:13,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:13,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 07:01:13,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 07:01:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-29 07:01:14,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 07:01:14,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 130 transitions, 1073 flow. Second operand has 20 states, 20 states have (on average 20.1) internal successors, (402), 20 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:14,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:01:14,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 07:01:14,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:22,833 INFO L124 PetriNetUnfolderBase]: 29885/47690 cut-off events. [2023-11-29 07:01:22,833 INFO L125 PetriNetUnfolderBase]: For 197922/201708 co-relation queries the response was YES. [2023-11-29 07:01:23,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199507 conditions, 47690 events. 29885/47690 cut-off events. For 197922/201708 co-relation queries the response was YES. Maximal size of possible extension queue 1760. Compared 396764 event pairs, 18455 based on Foata normal form. 1310/46848 useless extension candidates. Maximal degree in co-relation 195893. Up to 17155 conditions per place. [2023-11-29 07:01:23,431 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 232 selfloop transitions, 28 changer transitions 10/299 dead transitions. [2023-11-29 07:01:23,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 299 transitions, 2918 flow [2023-11-29 07:01:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 07:01:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 07:01:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 439 transitions. [2023-11-29 07:01:23,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479591836734694 [2023-11-29 07:01:23,433 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 439 transitions. [2023-11-29 07:01:23,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 439 transitions. [2023-11-29 07:01:23,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:01:23,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 439 transitions. [2023-11-29 07:01:23,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 31.357142857142858) internal successors, (439), 14 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:23,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:23,435 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:23,435 INFO L175 Difference]: Start difference. First operand has 176 places, 130 transitions, 1073 flow. Second operand 14 states and 439 transitions. [2023-11-29 07:01:23,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 299 transitions, 2918 flow [2023-11-29 07:01:23,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 299 transitions, 2823 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-11-29 07:01:23,820 INFO L231 Difference]: Finished difference. Result has 178 places, 134 transitions, 1128 flow [2023-11-29 07:01:23,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1128, PETRI_PLACES=178, PETRI_TRANSITIONS=134} [2023-11-29 07:01:23,821 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 107 predicate places. [2023-11-29 07:01:23,821 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 134 transitions, 1128 flow [2023-11-29 07:01:23,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.1) internal successors, (402), 20 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:23,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:01:23,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:01:23,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 07:01:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:24,022 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:01:24,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:24,022 INFO L85 PathProgramCache]: Analyzing trace with hash -268893545, now seen corresponding path program 2 times [2023-11-29 07:01:24,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:24,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545762856] [2023-11-29 07:01:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:24,326 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 07:01:24,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545762856] [2023-11-29 07:01:24,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545762856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:24,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254469625] [2023-11-29 07:01:24,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:01:24,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:24,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:24,329 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:24,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 07:01:24,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 07:01:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:01:24,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 07:01:24,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:24,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 07:01:24,858 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 07:01:24,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:25,189 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 07:01:25,193 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 07:01:25,348 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 07:01:25,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254469625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:25,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:25,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-11-29 07:01:25,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409883849] [2023-11-29 07:01:25,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 07:01:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 07:01:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2023-11-29 07:01:25,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 07:01:25,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 134 transitions, 1128 flow. Second operand has 30 states, 30 states have (on average 19.4) internal successors, (582), 30 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:25,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:01:25,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 07:01:25,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:44,589 INFO L124 PetriNetUnfolderBase]: 54085/84566 cut-off events. [2023-11-29 07:01:44,590 INFO L125 PetriNetUnfolderBase]: For 378332/399825 co-relation queries the response was YES. [2023-11-29 07:01:45,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348514 conditions, 84566 events. 54085/84566 cut-off events. For 378332/399825 co-relation queries the response was YES. Maximal size of possible extension queue 2601. Compared 733395 event pairs, 8128 based on Foata normal form. 3026/83491 useless extension candidates. Maximal degree in co-relation 330352. Up to 9956 conditions per place. [2023-11-29 07:01:45,877 INFO L140 encePairwiseOnDemand]: 55/70 looper letters, 826 selfloop transitions, 57 changer transitions 0/915 dead transitions. [2023-11-29 07:01:45,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 915 transitions, 8824 flow [2023-11-29 07:01:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 07:01:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 07:01:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1265 transitions. [2023-11-29 07:01:45,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755639097744361 [2023-11-29 07:01:45,880 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1265 transitions. [2023-11-29 07:01:45,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1265 transitions. [2023-11-29 07:01:45,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:01:45,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1265 transitions. [2023-11-29 07:01:45,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 33.28947368421053) internal successors, (1265), 38 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:45,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 70.0) internal successors, (2730), 39 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:45,885 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 70.0) internal successors, (2730), 39 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:45,885 INFO L175 Difference]: Start difference. First operand has 178 places, 134 transitions, 1128 flow. Second operand 38 states and 1265 transitions. [2023-11-29 07:01:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 915 transitions, 8824 flow [2023-11-29 07:01:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 915 transitions, 8760 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-29 07:01:46,904 INFO L231 Difference]: Finished difference. Result has 215 places, 164 transitions, 1461 flow [2023-11-29 07:01:46,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1461, PETRI_PLACES=215, PETRI_TRANSITIONS=164} [2023-11-29 07:01:46,905 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 144 predicate places. [2023-11-29 07:01:46,905 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 164 transitions, 1461 flow [2023-11-29 07:01:46,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 19.4) internal successors, (582), 30 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:46,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:01:46,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:01:46,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 07:01:47,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:47,106 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:01:47,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:01:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash -268893544, now seen corresponding path program 1 times [2023-11-29 07:01:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:01:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983517418] [2023-11-29 07:01:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:01:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:47,394 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 07:01:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:01:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983517418] [2023-11-29 07:01:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983517418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:01:47,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521876965] [2023-11-29 07:01:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:01:47,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:01:47,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:01:47,396 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:01:47,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 07:01:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:01:47,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 07:01:47,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:01:47,605 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 07:01:47,710 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 07:01:47,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:01:47,827 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 07:01:47,830 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 07:01:47,836 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 07:01:47,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521876965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:01:47,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:01:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 07:01:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456087717] [2023-11-29 07:01:47,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:01:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 07:01:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:01:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 07:01:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-29 07:01:47,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 70 [2023-11-29 07:01:47,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 164 transitions, 1461 flow. Second operand has 23 states, 23 states have (on average 20.434782608695652) internal successors, (470), 23 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:01:47,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:01:47,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 70 [2023-11-29 07:01:47,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:02:03,284 INFO L124 PetriNetUnfolderBase]: 50104/81638 cut-off events. [2023-11-29 07:02:03,284 INFO L125 PetriNetUnfolderBase]: For 430664/450698 co-relation queries the response was YES. [2023-11-29 07:02:04,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357915 conditions, 81638 events. 50104/81638 cut-off events. For 430664/450698 co-relation queries the response was YES. Maximal size of possible extension queue 2593. Compared 736205 event pairs, 10461 based on Foata normal form. 3223/80193 useless extension candidates. Maximal degree in co-relation 340541. Up to 21463 conditions per place. [2023-11-29 07:02:04,484 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 310 selfloop transitions, 43 changer transitions 0/388 dead transitions. [2023-11-29 07:02:04,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 388 transitions, 3868 flow [2023-11-29 07:02:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 07:02:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 07:02:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 444 transitions. [2023-11-29 07:02:04,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530612244897959 [2023-11-29 07:02:04,486 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 444 transitions. [2023-11-29 07:02:04,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 444 transitions. [2023-11-29 07:02:04,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:02:04,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 444 transitions. [2023-11-29 07:02:04,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 31.714285714285715) internal successors, (444), 14 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:04,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:04,489 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:04,489 INFO L175 Difference]: Start difference. First operand has 215 places, 164 transitions, 1461 flow. Second operand 14 states and 444 transitions. [2023-11-29 07:02:04,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 388 transitions, 3868 flow [2023-11-29 07:02:05,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 388 transitions, 3691 flow, removed 31 selfloop flow, removed 20 redundant places. [2023-11-29 07:02:05,977 INFO L231 Difference]: Finished difference. Result has 210 places, 168 transitions, 1453 flow [2023-11-29 07:02:05,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1453, PETRI_PLACES=210, PETRI_TRANSITIONS=168} [2023-11-29 07:02:05,977 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 139 predicate places. [2023-11-29 07:02:05,977 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 168 transitions, 1453 flow [2023-11-29 07:02:05,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 20.434782608695652) internal successors, (470), 23 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:05,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:02:05,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:05,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 07:02:06,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 07:02:06,179 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:02:06,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash -268893541, now seen corresponding path program 1 times [2023-11-29 07:02:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:06,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826419407] [2023-11-29 07:02:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 07:02:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826419407] [2023-11-29 07:02:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826419407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:06,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:02:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084523054] [2023-11-29 07:02:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:02:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:02:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:02:06,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-29 07:02:06,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 168 transitions, 1453 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:06,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:02:06,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-29 07:02:06,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:02:18,488 INFO L124 PetriNetUnfolderBase]: 39334/69345 cut-off events. [2023-11-29 07:02:18,488 INFO L125 PetriNetUnfolderBase]: For 345112/358307 co-relation queries the response was YES. [2023-11-29 07:02:19,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297337 conditions, 69345 events. 39334/69345 cut-off events. For 345112/358307 co-relation queries the response was YES. Maximal size of possible extension queue 2166. Compared 671031 event pairs, 11227 based on Foata normal form. 1314/67956 useless extension candidates. Maximal degree in co-relation 281325. Up to 34438 conditions per place. [2023-11-29 07:02:19,499 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 167 selfloop transitions, 12 changer transitions 0/223 dead transitions. [2023-11-29 07:02:19,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 223 transitions, 2346 flow [2023-11-29 07:02:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:02:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:02:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2023-11-29 07:02:19,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2023-11-29 07:02:19,500 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 146 transitions. [2023-11-29 07:02:19,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 146 transitions. [2023-11-29 07:02:19,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:02:19,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 146 transitions. [2023-11-29 07:02:19,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.5) internal successors, (146), 4 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 07:02:19,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:19,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:19,502 INFO L175 Difference]: Start difference. First operand has 210 places, 168 transitions, 1453 flow. Second operand 4 states and 146 transitions. [2023-11-29 07:02:19,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 223 transitions, 2346 flow [2023-11-29 07:02:20,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 223 transitions, 2295 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-11-29 07:02:20,489 INFO L231 Difference]: Finished difference. Result has 200 places, 165 transitions, 1393 flow [2023-11-29 07:02:20,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1393, PETRI_PLACES=200, PETRI_TRANSITIONS=165} [2023-11-29 07:02:20,489 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 129 predicate places. [2023-11-29 07:02:20,489 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 165 transitions, 1393 flow [2023-11-29 07:02:20,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:20,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:02:20,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-29 07:02:20,490 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:02:20,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash -268893542, now seen corresponding path program 1 times [2023-11-29 07:02:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956953237] [2023-11-29 07:02:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 07:02:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956953237] [2023-11-29 07:02:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956953237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:02:20,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:02:20,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:02:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918302691] [2023-11-29 07:02:20,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:02:20,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:02:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:02:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:02:20,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 70 [2023-11-29 07:02:20,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 165 transitions, 1393 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:20,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:02:20,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 70 [2023-11-29 07:02:20,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:02:31,504 INFO L124 PetriNetUnfolderBase]: 35332/63689 cut-off events. [2023-11-29 07:02:31,504 INFO L125 PetriNetUnfolderBase]: For 311930/323257 co-relation queries the response was YES. [2023-11-29 07:02:32,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267444 conditions, 63689 events. 35332/63689 cut-off events. For 311930/323257 co-relation queries the response was YES. Maximal size of possible extension queue 1954. Compared 623044 event pairs, 11203 based on Foata normal form. 1182/63840 useless extension candidates. Maximal degree in co-relation 251434. Up to 28800 conditions per place. [2023-11-29 07:02:32,399 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 164 selfloop transitions, 12 changer transitions 0/220 dead transitions. [2023-11-29 07:02:32,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 220 transitions, 2280 flow [2023-11-29 07:02:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:02:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 07:02:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2023-11-29 07:02:32,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2023-11-29 07:02:32,400 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 145 transitions. [2023-11-29 07:02:32,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 145 transitions. [2023-11-29 07:02:32,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:02:32,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 145 transitions. [2023-11-29 07:02:32,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:32,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:32,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:32,401 INFO L175 Difference]: Start difference. First operand has 200 places, 165 transitions, 1393 flow. Second operand 4 states and 145 transitions. [2023-11-29 07:02:32,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 220 transitions, 2280 flow [2023-11-29 07:02:33,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 220 transitions, 2267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 07:02:33,245 INFO L231 Difference]: Finished difference. Result has 200 places, 162 transitions, 1371 flow [2023-11-29 07:02:33,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1371, PETRI_PLACES=200, PETRI_TRANSITIONS=162} [2023-11-29 07:02:33,245 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 129 predicate places. [2023-11-29 07:02:33,245 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 162 transitions, 1371 flow [2023-11-29 07:02:33,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:33,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:02:33,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-29 07:02:33,246 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:02:33,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:33,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2042248313, now seen corresponding path program 2 times [2023-11-29 07:02:33,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:33,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109250780] [2023-11-29 07:02:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109250780] [2023-11-29 07:02:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109250780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665351654] [2023-11-29 07:02:34,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:02:34,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:34,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:34,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:34,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 07:02:34,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 07:02:34,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:02:34,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 07:02:34,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:34,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 07:02:34,446 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 07:02:34,446 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 31 treesize of output 15 [2023-11-29 07:02:34,611 INFO L349 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2023-11-29 07:02:34,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 41 [2023-11-29 07:02:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:35,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:02:44,357 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 32 treesize of output 30 [2023-11-29 07:02:44,364 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 430 treesize of output 406 [2023-11-29 07:02:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665351654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:02:44,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:02:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-29 07:02:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122991274] [2023-11-29 07:02:44,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:02:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 07:02:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 07:02:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=849, Unknown=1, NotChecked=0, Total=992 [2023-11-29 07:02:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 07:02:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 162 transitions, 1371 flow. Second operand has 32 states, 32 states have (on average 22.5) internal successors, (720), 32 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:02:45,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:02:45,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 07:02:45,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:03:01,707 INFO L124 PetriNetUnfolderBase]: 48884/79956 cut-off events. [2023-11-29 07:03:01,707 INFO L125 PetriNetUnfolderBase]: For 437948/446771 co-relation queries the response was YES. [2023-11-29 07:03:02,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361212 conditions, 79956 events. 48884/79956 cut-off events. For 437948/446771 co-relation queries the response was YES. Maximal size of possible extension queue 2184. Compared 712788 event pairs, 21172 based on Foata normal form. 1753/80807 useless extension candidates. Maximal degree in co-relation 343659. Up to 16534 conditions per place. [2023-11-29 07:03:03,050 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 430 selfloop transitions, 56 changer transitions 1/528 dead transitions. [2023-11-29 07:03:03,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 528 transitions, 5225 flow [2023-11-29 07:03:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 07:03:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 07:03:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 889 transitions. [2023-11-29 07:03:03,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2023-11-29 07:03:03,052 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 889 transitions. [2023-11-29 07:03:03,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 889 transitions. [2023-11-29 07:03:03,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:03:03,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 889 transitions. [2023-11-29 07:03:03,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 31.75) internal successors, (889), 28 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:03,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:03,055 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:03,055 INFO L175 Difference]: Start difference. First operand has 200 places, 162 transitions, 1371 flow. Second operand 28 states and 889 transitions. [2023-11-29 07:03:03,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 528 transitions, 5225 flow [2023-11-29 07:03:05,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 528 transitions, 5117 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 07:03:05,476 INFO L231 Difference]: Finished difference. Result has 229 places, 184 transitions, 1666 flow [2023-11-29 07:03:05,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1666, PETRI_PLACES=229, PETRI_TRANSITIONS=184} [2023-11-29 07:03:05,477 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 158 predicate places. [2023-11-29 07:03:05,477 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 184 transitions, 1666 flow [2023-11-29 07:03:05,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 22.5) internal successors, (720), 32 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:05,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:03:05,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:03:05,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 07:03:05,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 07:03:05,678 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:03:05,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2042248314, now seen corresponding path program 2 times [2023-11-29 07:03:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052736803] [2023-11-29 07:03:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:05,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:03:06,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052736803] [2023-11-29 07:03:06,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052736803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:03:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482008623] [2023-11-29 07:03:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:03:06,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:06,492 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:06,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 07:03:06,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 07:03:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:03:06,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 07:03:06,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:06,671 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 07:03:06,753 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-29 07:03:06,753 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 17 [2023-11-29 07:03:06,951 INFO L349 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2023-11-29 07:03:06,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 45 [2023-11-29 07:03:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:03:07,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:12,673 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 34 treesize of output 32 [2023-11-29 07:03:12,679 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 494 treesize of output 470 [2023-11-29 07:03:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:03:12,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482008623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:12,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:03:12,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-29 07:03:12,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705774068] [2023-11-29 07:03:12,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 07:03:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:12,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 07:03:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2023-11-29 07:03:13,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 70 [2023-11-29 07:03:13,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 184 transitions, 1666 flow. Second operand has 32 states, 32 states have (on average 22.5) internal successors, (720), 32 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:13,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:03:13,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 70 [2023-11-29 07:03:13,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:03:30,777 INFO L124 PetriNetUnfolderBase]: 47613/78079 cut-off events. [2023-11-29 07:03:30,777 INFO L125 PetriNetUnfolderBase]: For 475861/484078 co-relation queries the response was YES. [2023-11-29 07:03:31,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372685 conditions, 78079 events. 47613/78079 cut-off events. For 475861/484078 co-relation queries the response was YES. Maximal size of possible extension queue 2125. Compared 696334 event pairs, 21136 based on Foata normal form. 1343/78482 useless extension candidates. Maximal degree in co-relation 354757. Up to 16534 conditions per place. [2023-11-29 07:03:32,137 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 394 selfloop transitions, 56 changer transitions 1/492 dead transitions. [2023-11-29 07:03:32,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 492 transitions, 4938 flow [2023-11-29 07:03:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 07:03:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 07:03:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 850 transitions. [2023-11-29 07:03:32,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2023-11-29 07:03:32,139 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 850 transitions. [2023-11-29 07:03:32,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 850 transitions. [2023-11-29 07:03:32,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:03:32,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 850 transitions. [2023-11-29 07:03:32,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 31.48148148148148) internal successors, (850), 27 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:32,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 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 07:03:32,142 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 70.0) internal successors, (1960), 28 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 07:03:32,142 INFO L175 Difference]: Start difference. First operand has 229 places, 184 transitions, 1666 flow. Second operand 27 states and 850 transitions. [2023-11-29 07:03:32,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 492 transitions, 4938 flow [2023-11-29 07:03:36,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 492 transitions, 4869 flow, removed 12 selfloop flow, removed 14 redundant places. [2023-11-29 07:03:36,630 INFO L231 Difference]: Finished difference. Result has 241 places, 184 transitions, 1713 flow [2023-11-29 07:03:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1713, PETRI_PLACES=241, PETRI_TRANSITIONS=184} [2023-11-29 07:03:36,631 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 170 predicate places. [2023-11-29 07:03:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 184 transitions, 1713 flow [2023-11-29 07:03:36,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 22.5) internal successors, (720), 32 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:36,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:03:36,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:03:36,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 07:03:36,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 07:03:36,832 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:03:36,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:36,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1892814994, now seen corresponding path program 1 times [2023-11-29 07:03:36,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:36,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718130284] [2023-11-29 07:03:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:36,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:36,949 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 07:03:36,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:36,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718130284] [2023-11-29 07:03:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718130284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:03:36,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211125654] [2023-11-29 07:03:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:36,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:36,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:36,951 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:36,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 07:03:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:37,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 07:03:37,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:37,318 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 07:03:37,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:37,422 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 07:03:37,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211125654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:37,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:03:37,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-29 07:03:37,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926359508] [2023-11-29 07:03:37,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 07:03:37,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 07:03:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-29 07:03:37,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 07:03:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 184 transitions, 1713 flow. Second operand has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 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 07:03:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:03:37,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 07:03:37,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:03:54,144 INFO L124 PetriNetUnfolderBase]: 56926/88056 cut-off events. [2023-11-29 07:03:54,144 INFO L125 PetriNetUnfolderBase]: For 556477/565817 co-relation queries the response was YES. [2023-11-29 07:03:55,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424695 conditions, 88056 events. 56926/88056 cut-off events. For 556477/565817 co-relation queries the response was YES. Maximal size of possible extension queue 2485. Compared 743341 event pairs, 45144 based on Foata normal form. 1136/87918 useless extension candidates. Maximal degree in co-relation 415383. Up to 76495 conditions per place. [2023-11-29 07:03:55,659 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 99 selfloop transitions, 15 changer transitions 91/239 dead transitions. [2023-11-29 07:03:55,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 239 transitions, 2503 flow [2023-11-29 07:03:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:03:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 07:03:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2023-11-29 07:03:55,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042857142857143 [2023-11-29 07:03:55,661 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 283 transitions. [2023-11-29 07:03:55,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 283 transitions. [2023-11-29 07:03:55,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:03:55,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 283 transitions. [2023-11-29 07:03:55,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 28.3) internal successors, (283), 10 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:55,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:55,662 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:03:55,662 INFO L175 Difference]: Start difference. First operand has 241 places, 184 transitions, 1713 flow. Second operand 10 states and 283 transitions. [2023-11-29 07:03:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 239 transitions, 2503 flow [2023-11-29 07:04:00,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 239 transitions, 2401 flow, removed 6 selfloop flow, removed 24 redundant places. [2023-11-29 07:04:00,012 INFO L231 Difference]: Finished difference. Result has 223 places, 148 transitions, 1220 flow [2023-11-29 07:04:00,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1220, PETRI_PLACES=223, PETRI_TRANSITIONS=148} [2023-11-29 07:04:00,013 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 152 predicate places. [2023-11-29 07:04:00,013 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 148 transitions, 1220 flow [2023-11-29 07:04:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 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 07:04:00,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:04:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:04:00,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 07:04:00,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 07:04:00,214 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-29 07:04:00,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:04:00,214 INFO L85 PathProgramCache]: Analyzing trace with hash -802946835, now seen corresponding path program 2 times [2023-11-29 07:04:00,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:04:00,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849100042] [2023-11-29 07:04:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:00,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:04:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:04:00,609 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 07:04:00,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:04:00,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849100042] [2023-11-29 07:04:00,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849100042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:04:00,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090899628] [2023-11-29 07:04:00,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:04:00,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:04:00,610 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:04:00,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f68833-b41d-4059-b376-0fdb85a6be26/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 07:04:00,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 07:04:00,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:04:00,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 07:04:00,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:04:00,782 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 07:04:00,895 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 07:04:00,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:04:01,012 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 07:04:01,014 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 07:04:01,020 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 07:04:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090899628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:04:01,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:04:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2023-11-29 07:04:01,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172323393] [2023-11-29 07:04:01,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:04:01,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 07:04:01,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:04:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 07:04:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-11-29 07:04:01,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 07:04:01,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 148 transitions, 1220 flow. Second operand has 25 states, 25 states have (on average 19.8) internal successors, (495), 25 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 07:04:01,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:04:01,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 07:04:01,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand