./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/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_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/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_dc24d76c-1677-432d-88e5-9e5c8299a02b/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 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:24:53,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:24:53,327 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 02:24:53,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:24:53,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:24:53,355 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:24:53,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:24:53,356 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:24:53,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:24:53,357 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:24:53,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:24:53,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:24:53,359 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:24:53,359 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:24:53,360 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:24:53,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:24:53,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:24:53,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:24:53,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:24:53,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:24:53,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:24:53,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:24:53,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:24:53,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:24:53,365 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 02:24:53,365 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:24:53,366 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:24:53,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:24:53,367 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:24:53,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:24:53,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:24:53,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:24:53,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:24:53,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:24:53,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:24:53,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:24:53,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:24:53,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:24:53,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:24:53,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:24:53,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:24:53,370 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:24:53,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:24:53,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:24:53,371 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_dc24d76c-1677-432d-88e5-9e5c8299a02b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2023-11-29 02:24:53,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:24:53,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:24:53,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:24:53,614 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:24:53,614 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:24:53,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-29 02:24:56,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:24:56,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:24:56,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2023-11-29 02:24:56,476 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/data/9d9528325/ab18ece38e5f4be4b694bfd30d2d9e14/FLAG065a58a49 [2023-11-29 02:24:56,490 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/data/9d9528325/ab18ece38e5f4be4b694bfd30d2d9e14 [2023-11-29 02:24:56,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:24:56,494 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:24:56,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:24:56,495 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:24:56,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:24:56,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b288211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56, skipping insertion in model container [2023-11-29 02:24:56,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:24:56,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:24:56,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:24:56,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:24:56,733 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:24:56,733 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:24:56,741 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:24:56,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56 WrapperNode [2023-11-29 02:24:56,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:24:56,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:24:56,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:24:56,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:24:56,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,757 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,775 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-11-29 02:24:56,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:24:56,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:24:56,776 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:24:56,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:24:56,785 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,802 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 02:24:56,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,815 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:24:56,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:24:56,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:24:56,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:24:56,820 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (1/1) ... [2023-11-29 02:24:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:24:56,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:56,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:24:56,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:24:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:24:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:24:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:24:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:24:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:24:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:24:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:24:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:24:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:24:56,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:24:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:24:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:24:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:24:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:24:56,886 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 02:24:56,993 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:24:56,995 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:24:57,183 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:24:57,330 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:24:57,330 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:24:57,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:24:57 BoogieIcfgContainer [2023-11-29 02:24:57,331 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:24:57,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:24:57,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:24:57,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:24:57,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:24:56" (1/3) ... [2023-11-29 02:24:57,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a37511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:24:57, skipping insertion in model container [2023-11-29 02:24:57,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:24:56" (2/3) ... [2023-11-29 02:24:57,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a37511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:24:57, skipping insertion in model container [2023-11-29 02:24:57,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:24:57" (3/3) ... [2023-11-29 02:24:57,340 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-29 02:24:57,349 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:24:57,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:24:57,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 02:24:57,359 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:24:57,404 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:24:57,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2023-11-29 02:24:57,465 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-11-29 02:24:57,465 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:24:57,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-29 02:24:57,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2023-11-29 02:24:57,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2023-11-29 02:24:57,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:24:57,491 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;@1111b4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:24:57,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-29 02:24:57,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:24:57,497 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-29 02:24:57,497 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:24:57,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:57,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:24:57,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:24:57,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash 296733280, now seen corresponding path program 1 times [2023-11-29 02:24:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:57,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827907856] [2023-11-29 02:24:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:57,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:57,762 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 02:24:57,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:57,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827907856] [2023-11-29 02:24:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827907856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:57,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:24:57,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:24:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022259496] [2023-11-29 02:24:57,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:57,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:24:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:24:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:24:57,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:24:57,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:57,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:57,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:24:57,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:57,970 INFO L124 PetriNetUnfolderBase]: 127/317 cut-off events. [2023-11-29 02:24:57,970 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-29 02:24:57,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 317 events. 127/317 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1458 event pairs, 44 based on Foata normal form. 8/267 useless extension candidates. Maximal degree in co-relation 487. Up to 175 conditions per place. [2023-11-29 02:24:57,976 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 27 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-29 02:24:57,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 165 flow [2023-11-29 02:24:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:24:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:24:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-29 02:24:57,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477477477477478 [2023-11-29 02:24:57,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-29 02:24:57,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-29 02:24:57,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:57,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-29 02:24:57,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:57,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:57,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:57,996 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 83 transitions. [2023-11-29 02:24:57,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 165 flow [2023-11-29 02:24:58,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:24:58,002 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 88 flow [2023-11-29 02:24:58,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-11-29 02:24:58,007 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-29 02:24:58,007 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 88 flow [2023-11-29 02:24:58,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:58,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:58,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:24:58,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:24:58,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1692851779, now seen corresponding path program 1 times [2023-11-29 02:24:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:58,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166070974] [2023-11-29 02:24:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:58,101 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 02:24:58,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:58,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166070974] [2023-11-29 02:24:58,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166070974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:58,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:24:58,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:24:58,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185127371] [2023-11-29 02:24:58,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:58,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:24:58,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:24:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:24:58,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-29 02:24:58,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:58,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-29 02:24:58,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:58,262 INFO L124 PetriNetUnfolderBase]: 212/440 cut-off events. [2023-11-29 02:24:58,262 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-29 02:24:58,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 440 events. 212/440 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2077 event pairs, 107 based on Foata normal form. 12/389 useless extension candidates. Maximal degree in co-relation 464. Up to 305 conditions per place. [2023-11-29 02:24:58,268 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 38 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-11-29 02:24:58,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 220 flow [2023-11-29 02:24:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:24:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:24:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2023-11-29 02:24:58,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-29 02:24:58,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 96 transitions. [2023-11-29 02:24:58,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 96 transitions. [2023-11-29 02:24:58,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:58,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 96 transitions. [2023-11-29 02:24:58,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,274 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,274 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 88 flow. Second operand 4 states and 96 transitions. [2023-11-29 02:24:58,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 220 flow [2023-11-29 02:24:58,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:24:58,277 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 115 flow [2023-11-29 02:24:58,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-29 02:24:58,278 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-11-29 02:24:58,278 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 115 flow [2023-11-29 02:24:58,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:58,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:58,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:24:58,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:24:58,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:58,280 INFO L85 PathProgramCache]: Analyzing trace with hash 524683319, now seen corresponding path program 1 times [2023-11-29 02:24:58,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:58,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075456917] [2023-11-29 02:24:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:58,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:58,372 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 02:24:58,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:58,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075456917] [2023-11-29 02:24:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075456917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:58,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:24:58,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:24:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321053009] [2023-11-29 02:24:58,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:58,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:24:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:24:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:24:58,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:24:58,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:58,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:24:58,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:58,518 INFO L124 PetriNetUnfolderBase]: 224/594 cut-off events. [2023-11-29 02:24:58,518 INFO L125 PetriNetUnfolderBase]: For 144/158 co-relation queries the response was YES. [2023-11-29 02:24:58,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 594 events. 224/594 cut-off events. For 144/158 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3277 event pairs, 59 based on Foata normal form. 18/539 useless extension candidates. Maximal degree in co-relation 405. Up to 148 conditions per place. [2023-11-29 02:24:58,525 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 43 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-11-29 02:24:58,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 292 flow [2023-11-29 02:24:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:24:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:24:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-29 02:24:58,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.777027027027027 [2023-11-29 02:24:58,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-29 02:24:58,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-29 02:24:58,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:58,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-29 02:24:58,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,530 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 115 flow. Second operand 4 states and 115 transitions. [2023-11-29 02:24:58,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 292 flow [2023-11-29 02:24:58,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:24:58,534 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 170 flow [2023-11-29 02:24:58,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-29 02:24:58,535 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-11-29 02:24:58,535 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 170 flow [2023-11-29 02:24:58,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:58,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:58,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:24:58,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:24:58,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash 241680997, now seen corresponding path program 1 times [2023-11-29 02:24:58,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712606518] [2023-11-29 02:24:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:58,605 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 02:24:58,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:58,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712606518] [2023-11-29 02:24:58,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712606518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:58,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633469010] [2023-11-29 02:24:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:58,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:58,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:58,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:58,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:24:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:58,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:24:58,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:58,753 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 02:24:58,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:24:58,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633469010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:58,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:24:58,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-29 02:24:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979005890] [2023-11-29 02:24:58,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:58,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:24:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:24:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:24:58,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:24:58,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:58,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:24:58,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:58,906 INFO L124 PetriNetUnfolderBase]: 250/654 cut-off events. [2023-11-29 02:24:58,906 INFO L125 PetriNetUnfolderBase]: For 632/652 co-relation queries the response was YES. [2023-11-29 02:24:58,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 654 events. 250/654 cut-off events. For 632/652 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3579 event pairs, 64 based on Foata normal form. 32/638 useless extension candidates. Maximal degree in co-relation 711. Up to 252 conditions per place. [2023-11-29 02:24:58,913 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 32 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-29 02:24:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 297 flow [2023-11-29 02:24:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:24:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:24:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-29 02:24:58,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2023-11-29 02:24:58,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-29 02:24:58,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-29 02:24:58,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:58,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-29 02:24:58,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,917 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 170 flow. Second operand 4 states and 99 transitions. [2023-11-29 02:24:58,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 297 flow [2023-11-29 02:24:58,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 291 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 02:24:58,922 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 217 flow [2023-11-29 02:24:58,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-29 02:24:58,923 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-11-29 02:24:58,923 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 217 flow [2023-11-29 02:24:58,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:58,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:58,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:58,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:24:59,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:59,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:24:59,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1574481257, now seen corresponding path program 1 times [2023-11-29 02:24:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:59,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546092605] [2023-11-29 02:24:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:59,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:59,191 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 02:24:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546092605] [2023-11-29 02:24:59,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546092605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:59,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:24:59,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:24:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378421490] [2023-11-29 02:24:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:59,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:24:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:24:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:24:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-29 02:24:59,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:59,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-29 02:24:59,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:59,411 INFO L124 PetriNetUnfolderBase]: 549/1175 cut-off events. [2023-11-29 02:24:59,411 INFO L125 PetriNetUnfolderBase]: For 2091/2184 co-relation queries the response was YES. [2023-11-29 02:24:59,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 1175 events. 549/1175 cut-off events. For 2091/2184 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6529 event pairs, 279 based on Foata normal form. 47/1171 useless extension candidates. Maximal degree in co-relation 1076. Up to 710 conditions per place. [2023-11-29 02:24:59,424 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 60 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-29 02:24:59,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 555 flow [2023-11-29 02:24:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:24:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:24:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-29 02:24:59,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2023-11-29 02:24:59,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-29 02:24:59,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-29 02:24:59,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:59,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-29 02:24:59,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,428 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 217 flow. Second operand 4 states and 95 transitions. [2023-11-29 02:24:59,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 555 flow [2023-11-29 02:24:59,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 510 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-11-29 02:24:59,435 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 225 flow [2023-11-29 02:24:59,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-29 02:24:59,436 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2023-11-29 02:24:59,436 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 225 flow [2023-11-29 02:24:59,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:59,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:59,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:24:59,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:24:59,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash 327215368, now seen corresponding path program 1 times [2023-11-29 02:24:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:59,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231392553] [2023-11-29 02:24:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:59,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:24:59,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231392553] [2023-11-29 02:24:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231392553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702024679] [2023-11-29 02:24:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:59,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:59,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:24:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:59,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:24:59,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:24:59,624 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:24:59,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702024679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:24:59,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:24:59,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 02:24:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549475011] [2023-11-29 02:24:59,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:24:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:24:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:24:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:24:59,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-29 02:24:59,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:24:59,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-29 02:24:59,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:24:59,940 INFO L124 PetriNetUnfolderBase]: 489/1023 cut-off events. [2023-11-29 02:24:59,940 INFO L125 PetriNetUnfolderBase]: For 1414/1494 co-relation queries the response was YES. [2023-11-29 02:24:59,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3038 conditions, 1023 events. 489/1023 cut-off events. For 1414/1494 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5537 event pairs, 75 based on Foata normal form. 74/1038 useless extension candidates. Maximal degree in co-relation 1319. Up to 305 conditions per place. [2023-11-29 02:24:59,953 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 68 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-29 02:24:59,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 587 flow [2023-11-29 02:24:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:24:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:24:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2023-11-29 02:24:59,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2023-11-29 02:24:59,955 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 133 transitions. [2023-11-29 02:24:59,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 133 transitions. [2023-11-29 02:24:59,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:24:59,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 133 transitions. [2023-11-29 02:24:59,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 02:24:59,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,958 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 225 flow. Second operand 6 states and 133 transitions. [2023-11-29 02:24:59,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 587 flow [2023-11-29 02:24:59,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:24:59,965 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 232 flow [2023-11-29 02:24:59,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-11-29 02:24:59,966 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-11-29 02:24:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 232 flow [2023-11-29 02:24:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:59,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:24:59,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:24:59,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:25:00,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:00,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:00,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1553742141, now seen corresponding path program 1 times [2023-11-29 02:25:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:00,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679714530] [2023-11-29 02:25:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:00,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679714530] [2023-11-29 02:25:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679714530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115795683] [2023-11-29 02:25:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:00,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:00,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:25:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:00,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:25:00,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:00,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:00,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115795683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:00,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:00,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 02:25:00,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882593015] [2023-11-29 02:25:00,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:00,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:25:00,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:25:00,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:25:00,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-29 02:25:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 232 flow. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-29 02:25:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:00,950 INFO L124 PetriNetUnfolderBase]: 1059/2213 cut-off events. [2023-11-29 02:25:00,950 INFO L125 PetriNetUnfolderBase]: For 3885/4061 co-relation queries the response was YES. [2023-11-29 02:25:00,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 2213 events. 1059/2213 cut-off events. For 3885/4061 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12769 event pairs, 211 based on Foata normal form. 162/2360 useless extension candidates. Maximal degree in co-relation 2557. Up to 822 conditions per place. [2023-11-29 02:25:00,971 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 137 selfloop transitions, 13 changer transitions 0/162 dead transitions. [2023-11-29 02:25:00,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 162 transitions, 1181 flow [2023-11-29 02:25:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:25:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:25:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2023-11-29 02:25:00,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297297297297297 [2023-11-29 02:25:00,974 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 233 transitions. [2023-11-29 02:25:00,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 233 transitions. [2023-11-29 02:25:00,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:00,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 233 transitions. [2023-11-29 02:25:00,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.3) internal successors, (233), 10 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:00,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:00,977 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:00,977 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 232 flow. Second operand 10 states and 233 transitions. [2023-11-29 02:25:00,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 162 transitions, 1181 flow [2023-11-29 02:25:00,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 162 transitions, 1151 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-29 02:25:00,986 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 300 flow [2023-11-29 02:25:00,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-11-29 02:25:00,987 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2023-11-29 02:25:00,987 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 300 flow [2023-11-29 02:25:00,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:00,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:00,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:00,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:25:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:01,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:01,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash 440005725, now seen corresponding path program 1 times [2023-11-29 02:25:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:01,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978626111] [2023-11-29 02:25:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:01,244 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 02:25:01,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:01,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978626111] [2023-11-29 02:25:01,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978626111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:25:01,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:25:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:25:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738873219] [2023-11-29 02:25:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:25:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:25:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:25:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:25:01,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2023-11-29 02:25:01,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:01,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2023-11-29 02:25:01,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:01,421 INFO L124 PetriNetUnfolderBase]: 764/1653 cut-off events. [2023-11-29 02:25:01,421 INFO L125 PetriNetUnfolderBase]: For 3506/3619 co-relation queries the response was YES. [2023-11-29 02:25:01,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 1653 events. 764/1653 cut-off events. For 3506/3619 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9582 event pairs, 478 based on Foata normal form. 31/1605 useless extension candidates. Maximal degree in co-relation 3722. Up to 1257 conditions per place. [2023-11-29 02:25:01,434 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 36 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-29 02:25:01,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 372 flow [2023-11-29 02:25:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:25:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:25:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-29 02:25:01,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-11-29 02:25:01,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-29 02:25:01,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-29 02:25:01,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:01,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-29 02:25:01,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,436 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 300 flow. Second operand 3 states and 62 transitions. [2023-11-29 02:25:01,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 372 flow [2023-11-29 02:25:01,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 361 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 02:25:01,442 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 289 flow [2023-11-29 02:25:01,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-11-29 02:25:01,443 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-11-29 02:25:01,443 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 289 flow [2023-11-29 02:25:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:01,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:01,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:25:01,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:01,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1505819325, now seen corresponding path program 1 times [2023-11-29 02:25:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:01,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622781931] [2023-11-29 02:25:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:01,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:01,489 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 02:25:01,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:01,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622781931] [2023-11-29 02:25:01,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622781931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:25:01,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:25:01,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:25:01,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213567470] [2023-11-29 02:25:01,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:25:01,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:25:01,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:25:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:25:01,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2023-11-29 02:25:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:01,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2023-11-29 02:25:01,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:01,669 INFO L124 PetriNetUnfolderBase]: 764/1648 cut-off events. [2023-11-29 02:25:01,669 INFO L125 PetriNetUnfolderBase]: For 3138/3251 co-relation queries the response was YES. [2023-11-29 02:25:01,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 1648 events. 764/1648 cut-off events. For 3138/3251 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9504 event pairs, 478 based on Foata normal form. 31/1600 useless extension candidates. Maximal degree in co-relation 5206. Up to 1252 conditions per place. [2023-11-29 02:25:01,681 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 32 selfloop transitions, 1 changer transitions 5/52 dead transitions. [2023-11-29 02:25:01,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 359 flow [2023-11-29 02:25:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:25:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:25:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-29 02:25:01,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495495495495496 [2023-11-29 02:25:01,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-29 02:25:01,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-29 02:25:01,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:01,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-29 02:25:01,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,683 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 289 flow. Second operand 3 states and 61 transitions. [2023-11-29 02:25:01,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 359 flow [2023-11-29 02:25:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:25:01,689 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 272 flow [2023-11-29 02:25:01,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-11-29 02:25:01,690 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-11-29 02:25:01,690 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 272 flow [2023-11-29 02:25:01,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:01,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:25:01,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:01,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1558719064, now seen corresponding path program 1 times [2023-11-29 02:25:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668314078] [2023-11-29 02:25:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:01,741 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 02:25:01,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:01,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668314078] [2023-11-29 02:25:01,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668314078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:01,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757307736] [2023-11-29 02:25:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:01,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:01,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:01,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:25:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:01,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:25:01,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:01,850 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 02:25:01,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:01,890 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 02:25:01,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757307736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:01,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:01,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-29 02:25:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470641263] [2023-11-29 02:25:01,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:25:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:25:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:25:01,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:25:01,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 272 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:01,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:01,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:25:01,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:02,200 INFO L124 PetriNetUnfolderBase]: 866/2203 cut-off events. [2023-11-29 02:25:02,200 INFO L125 PetriNetUnfolderBase]: For 4976/5150 co-relation queries the response was YES. [2023-11-29 02:25:02,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 2203 events. 866/2203 cut-off events. For 4976/5150 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 14634 event pairs, 91 based on Foata normal form. 282/2476 useless extension candidates. Maximal degree in co-relation 6534. Up to 410 conditions per place. [2023-11-29 02:25:02,215 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 87 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2023-11-29 02:25:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 116 transitions, 794 flow [2023-11-29 02:25:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:25:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:25:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2023-11-29 02:25:02,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2023-11-29 02:25:02,217 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 185 transitions. [2023-11-29 02:25:02,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 185 transitions. [2023-11-29 02:25:02,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:02,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 185 transitions. [2023-11-29 02:25:02,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:02,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 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 02:25:02,218 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 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 02:25:02,219 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 272 flow. Second operand 7 states and 185 transitions. [2023-11-29 02:25:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 116 transitions, 794 flow [2023-11-29 02:25:02,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 116 transitions, 793 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:25:02,227 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 385 flow [2023-11-29 02:25:02,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-11-29 02:25:02,228 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-29 02:25:02,228 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 385 flow [2023-11-29 02:25:02,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:02,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:02,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:02,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:25:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:02,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:02,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash -525196980, now seen corresponding path program 1 times [2023-11-29 02:25:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:02,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847298021] [2023-11-29 02:25:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:02,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847298021] [2023-11-29 02:25:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847298021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751874210] [2023-11-29 02:25:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:02,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:02,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:25:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:02,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:25:02,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:02,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:25:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751874210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:25:02,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:25:02,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 02:25:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451671374] [2023-11-29 02:25:02,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:25:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:25:02,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:25:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:25:02,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-29 02:25:02,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 02:25:02,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:02,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-29 02:25:02,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:03,135 INFO L124 PetriNetUnfolderBase]: 1338/2819 cut-off events. [2023-11-29 02:25:03,135 INFO L125 PetriNetUnfolderBase]: For 8370/8545 co-relation queries the response was YES. [2023-11-29 02:25:03,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 2819 events. 1338/2819 cut-off events. For 8370/8545 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 17947 event pairs, 216 based on Foata normal form. 124/2799 useless extension candidates. Maximal degree in co-relation 9436. Up to 705 conditions per place. [2023-11-29 02:25:03,164 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 120 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2023-11-29 02:25:03,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 1336 flow [2023-11-29 02:25:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:25:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:25:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2023-11-29 02:25:03,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2023-11-29 02:25:03,165 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 130 transitions. [2023-11-29 02:25:03,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 130 transitions. [2023-11-29 02:25:03,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:03,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 130 transitions. [2023-11-29 02:25:03,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:03,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:03,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:03,167 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 385 flow. Second operand 6 states and 130 transitions. [2023-11-29 02:25:03,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 1336 flow [2023-11-29 02:25:03,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1251 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-11-29 02:25:03,184 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 368 flow [2023-11-29 02:25:03,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-11-29 02:25:03,185 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 31 predicate places. [2023-11-29 02:25:03,185 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 368 flow [2023-11-29 02:25:03,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 02:25:03,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:03,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:03,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:25:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:03,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1684455676, now seen corresponding path program 1 times [2023-11-29 02:25:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925270891] [2023-11-29 02:25:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:03,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925270891] [2023-11-29 02:25:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925270891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154775572] [2023-11-29 02:25:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:03,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:03,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:03,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:03,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:25:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:03,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:25:03,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:03,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154775572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:03,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:03,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 02:25:03,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146315233] [2023-11-29 02:25:03,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:25:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:25:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:25:03,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2023-11-29 02:25:03,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:03,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:03,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2023-11-29 02:25:03,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:04,448 INFO L124 PetriNetUnfolderBase]: 2203/4692 cut-off events. [2023-11-29 02:25:04,448 INFO L125 PetriNetUnfolderBase]: For 13339/13578 co-relation queries the response was YES. [2023-11-29 02:25:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15933 conditions, 4692 events. 2203/4692 cut-off events. For 13339/13578 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 30989 event pairs, 482 based on Foata normal form. 252/4900 useless extension candidates. Maximal degree in co-relation 15906. Up to 1600 conditions per place. [2023-11-29 02:25:04,485 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 211 selfloop transitions, 13 changer transitions 6/240 dead transitions. [2023-11-29 02:25:04,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 240 transitions, 2305 flow [2023-11-29 02:25:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:25:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:25:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2023-11-29 02:25:04,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054054054054054 [2023-11-29 02:25:04,488 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 224 transitions. [2023-11-29 02:25:04,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 224 transitions. [2023-11-29 02:25:04,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:04,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 224 transitions. [2023-11-29 02:25:04,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.4) internal successors, (224), 10 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 02:25:04,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:04,491 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:04,491 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 368 flow. Second operand 10 states and 224 transitions. [2023-11-29 02:25:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 240 transitions, 2305 flow [2023-11-29 02:25:04,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 240 transitions, 2275 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-29 02:25:04,565 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 431 flow [2023-11-29 02:25:04,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=431, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2023-11-29 02:25:04,566 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2023-11-29 02:25:04,566 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 431 flow [2023-11-29 02:25:04,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:04,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:04,567 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 02:25:04,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:25:04,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:04,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:04,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:04,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1254172511, now seen corresponding path program 1 times [2023-11-29 02:25:04,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:04,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706277674] [2023-11-29 02:25:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:04,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706277674] [2023-11-29 02:25:04,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706277674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359501618] [2023-11-29 02:25:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:04,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:04,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:25:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:04,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:25:04,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:05,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359501618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:05,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:05,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 02:25:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617290598] [2023-11-29 02:25:05,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:05,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:25:05,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:25:05,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:25:05,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:25:05,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 431 flow. Second operand has 13 states, 13 states have (on average 18.153846153846153) internal successors, (236), 13 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:05,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:05,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:25:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:06,254 INFO L124 PetriNetUnfolderBase]: 3601/8154 cut-off events. [2023-11-29 02:25:06,254 INFO L125 PetriNetUnfolderBase]: For 30277/30818 co-relation queries the response was YES. [2023-11-29 02:25:06,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29023 conditions, 8154 events. 3601/8154 cut-off events. For 30277/30818 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 63143 event pairs, 315 based on Foata normal form. 222/8338 useless extension candidates. Maximal degree in co-relation 28994. Up to 1343 conditions per place. [2023-11-29 02:25:06,329 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 221 selfloop transitions, 45 changer transitions 4/286 dead transitions. [2023-11-29 02:25:06,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 286 transitions, 2336 flow [2023-11-29 02:25:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:25:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:25:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 337 transitions. [2023-11-29 02:25:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.759009009009009 [2023-11-29 02:25:06,331 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 337 transitions. [2023-11-29 02:25:06,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 337 transitions. [2023-11-29 02:25:06,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:06,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 337 transitions. [2023-11-29 02:25:06,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 28.083333333333332) internal successors, (337), 12 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:06,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:06,334 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 37.0) internal successors, (481), 13 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:06,334 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 431 flow. Second operand 12 states and 337 transitions. [2023-11-29 02:25:06,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 286 transitions, 2336 flow [2023-11-29 02:25:06,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 286 transitions, 2235 flow, removed 33 selfloop flow, removed 2 redundant places. [2023-11-29 02:25:06,375 INFO L231 Difference]: Finished difference. Result has 96 places, 92 transitions, 924 flow [2023-11-29 02:25:06,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=924, PETRI_PLACES=96, PETRI_TRANSITIONS=92} [2023-11-29 02:25:06,376 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2023-11-29 02:25:06,376 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 92 transitions, 924 flow [2023-11-29 02:25:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.153846153846153) internal successors, (236), 13 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:06,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:06,377 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2023-11-29 02:25:06,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:25:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:25:06,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:06,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1132448478, now seen corresponding path program 2 times [2023-11-29 02:25:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101876751] [2023-11-29 02:25:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:06,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101876751] [2023-11-29 02:25:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101876751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031480259] [2023-11-29 02:25:06,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:25:06,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:06,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:06,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:06,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:25:06,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:25:06,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:25:06,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:25:06,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 02:25:06,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 02:25:06,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031480259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:06,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:06,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-29 02:25:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341116489] [2023-11-29 02:25:06,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:06,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:25:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:25:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:25:06,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-29 02:25:06,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 92 transitions, 924 flow. Second operand has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:06,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:06,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-29 02:25:06,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:08,650 INFO L124 PetriNetUnfolderBase]: 5869/10956 cut-off events. [2023-11-29 02:25:08,650 INFO L125 PetriNetUnfolderBase]: For 52188/52625 co-relation queries the response was YES. [2023-11-29 02:25:08,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41850 conditions, 10956 events. 5869/10956 cut-off events. For 52188/52625 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 77063 event pairs, 692 based on Foata normal form. 492/11436 useless extension candidates. Maximal degree in co-relation 41810. Up to 3469 conditions per place. [2023-11-29 02:25:08,715 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 363 selfloop transitions, 16 changer transitions 1/389 dead transitions. [2023-11-29 02:25:08,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 389 transitions, 4454 flow [2023-11-29 02:25:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:25:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:25:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 307 transitions. [2023-11-29 02:25:08,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531531531531532 [2023-11-29 02:25:08,717 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 307 transitions. [2023-11-29 02:25:08,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 307 transitions. [2023-11-29 02:25:08,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:08,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 307 transitions. [2023-11-29 02:25:08,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 20.466666666666665) internal successors, (307), 15 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:08,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:08,720 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:08,720 INFO L175 Difference]: Start difference. First operand has 96 places, 92 transitions, 924 flow. Second operand 15 states and 307 transitions. [2023-11-29 02:25:08,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 389 transitions, 4454 flow [2023-11-29 02:25:08,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 389 transitions, 4027 flow, removed 174 selfloop flow, removed 6 redundant places. [2023-11-29 02:25:08,815 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 874 flow [2023-11-29 02:25:08,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=874, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-11-29 02:25:08,816 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-29 02:25:08,816 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 874 flow [2023-11-29 02:25:08,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.266666666666667) internal successors, (214), 15 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:08,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:08,817 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:25:08,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:25:09,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:09,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:09,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash -533340585, now seen corresponding path program 2 times [2023-11-29 02:25:09,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:09,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032686515] [2023-11-29 02:25:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:25:09,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:09,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032686515] [2023-11-29 02:25:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032686515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125369916] [2023-11-29 02:25:09,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:25:09,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:09,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:09,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:25:09,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:25:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:25:09,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:25:09,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-29 02:25:09,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-29 02:25:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125369916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:09,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-29 02:25:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294334559] [2023-11-29 02:25:09,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:09,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:25:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:25:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:25:09,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-29 02:25:09,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 874 flow. Second operand has 15 states, 15 states have (on average 15.4) internal successors, (231), 15 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:09,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:09,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-29 02:25:09,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:11,960 INFO L124 PetriNetUnfolderBase]: 7648/14510 cut-off events. [2023-11-29 02:25:11,960 INFO L125 PetriNetUnfolderBase]: For 67187/68717 co-relation queries the response was YES. [2023-11-29 02:25:11,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54445 conditions, 14510 events. 7648/14510 cut-off events. For 67187/68717 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 106736 event pairs, 472 based on Foata normal form. 1064/15542 useless extension candidates. Maximal degree in co-relation 54406. Up to 2545 conditions per place. [2023-11-29 02:25:12,026 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 536 selfloop transitions, 21 changer transitions 52/619 dead transitions. [2023-11-29 02:25:12,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 619 transitions, 7657 flow [2023-11-29 02:25:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:25:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 02:25:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 312 transitions. [2023-11-29 02:25:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2023-11-29 02:25:12,029 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 312 transitions. [2023-11-29 02:25:12,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 312 transitions. [2023-11-29 02:25:12,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:12,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 312 transitions. [2023-11-29 02:25:12,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 20.8) internal successors, (312), 15 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:12,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:12,033 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 37.0) internal successors, (592), 16 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:12,033 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 874 flow. Second operand 15 states and 312 transitions. [2023-11-29 02:25:12,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 619 transitions, 7657 flow [2023-11-29 02:25:12,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 619 transitions, 7433 flow, removed 52 selfloop flow, removed 14 redundant places. [2023-11-29 02:25:12,128 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 874 flow [2023-11-29 02:25:12,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=874, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2023-11-29 02:25:12,129 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-11-29 02:25:12,129 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 874 flow [2023-11-29 02:25:12,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.4) internal successors, (231), 15 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:12,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:12,130 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-29 02:25:12,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:25:12,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:25:12,331 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:12,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1386865153, now seen corresponding path program 2 times [2023-11-29 02:25:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:12,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567465137] [2023-11-29 02:25:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:12,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:12,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:12,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567465137] [2023-11-29 02:25:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567465137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:12,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997089084] [2023-11-29 02:25:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:25:12,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:12,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:12,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:25:12,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:25:12,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:25:12,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:25:12,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:12,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997089084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:12,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:12,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-29 02:25:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547612232] [2023-11-29 02:25:12,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:12,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:25:12,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:25:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:25:12,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:25:12,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 874 flow. Second operand has 25 states, 25 states have (on average 18.08) internal successors, (452), 25 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:12,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:12,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:25:12,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:16,016 INFO L124 PetriNetUnfolderBase]: 8201/19221 cut-off events. [2023-11-29 02:25:16,016 INFO L125 PetriNetUnfolderBase]: For 126326/127984 co-relation queries the response was YES. [2023-11-29 02:25:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73411 conditions, 19221 events. 8201/19221 cut-off events. For 126326/127984 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 160626 event pairs, 417 based on Foata normal form. 598/19804 useless extension candidates. Maximal degree in co-relation 73374. Up to 3487 conditions per place. [2023-11-29 02:25:16,145 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 443 selfloop transitions, 205 changer transitions 0/666 dead transitions. [2023-11-29 02:25:16,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 666 transitions, 6594 flow [2023-11-29 02:25:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:25:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 02:25:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 616 transitions. [2023-11-29 02:25:16,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2023-11-29 02:25:16,149 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 616 transitions. [2023-11-29 02:25:16,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 616 transitions. [2023-11-29 02:25:16,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:16,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 616 transitions. [2023-11-29 02:25:16,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 25.666666666666668) internal successors, (616), 24 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:16,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 37.0) internal successors, (925), 25 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:16,155 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 37.0) internal successors, (925), 25 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:16,155 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 874 flow. Second operand 24 states and 616 transitions. [2023-11-29 02:25:16,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 666 transitions, 6594 flow [2023-11-29 02:25:16,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 666 transitions, 5747 flow, removed 118 selfloop flow, removed 15 redundant places. [2023-11-29 02:25:16,256 INFO L231 Difference]: Finished difference. Result has 132 places, 255 transitions, 3310 flow [2023-11-29 02:25:16,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3310, PETRI_PLACES=132, PETRI_TRANSITIONS=255} [2023-11-29 02:25:16,256 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 93 predicate places. [2023-11-29 02:25:16,257 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 255 transitions, 3310 flow [2023-11-29 02:25:16,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.08) internal successors, (452), 25 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:16,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:16,257 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2023-11-29 02:25:16,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:25:16,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:25:16,458 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:16,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash 718666945, now seen corresponding path program 3 times [2023-11-29 02:25:16,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:16,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223453548] [2023-11-29 02:25:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:17,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223453548] [2023-11-29 02:25:17,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223453548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875173579] [2023-11-29 02:25:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:25:17,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:17,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:17,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:25:17,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-29 02:25:17,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:25:17,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:25:17,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:17,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:17,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875173579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:17,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:17,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-29 02:25:17,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695765691] [2023-11-29 02:25:17,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:17,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 02:25:17,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 02:25:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 02:25:18,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:25:18,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 255 transitions, 3310 flow. Second operand has 49 states, 49 states have (on average 18.040816326530614) internal successors, (884), 49 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:25:18,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:25:30,046 INFO L124 PetriNetUnfolderBase]: 22071/51608 cut-off events. [2023-11-29 02:25:30,046 INFO L125 PetriNetUnfolderBase]: For 826625/829953 co-relation queries the response was YES. [2023-11-29 02:25:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191095 conditions, 51608 events. 22071/51608 cut-off events. For 826625/829953 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 462446 event pairs, 1397 based on Foata normal form. 1520/53113 useless extension candidates. Maximal degree in co-relation 191040. Up to 8679 conditions per place. [2023-11-29 02:25:30,513 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 875 selfloop transitions, 821 changer transitions 0/1714 dead transitions. [2023-11-29 02:25:30,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1714 transitions, 19054 flow [2023-11-29 02:25:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:25:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 02:25:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1240 transitions. [2023-11-29 02:25:30,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6981981981981982 [2023-11-29 02:25:30,516 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 1240 transitions. [2023-11-29 02:25:30,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 1240 transitions. [2023-11-29 02:25:30,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:25:30,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 1240 transitions. [2023-11-29 02:25:30,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 25.833333333333332) internal successors, (1240), 48 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:30,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 37.0) internal successors, (1813), 49 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:30,523 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 37.0) internal successors, (1813), 49 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:30,524 INFO L175 Difference]: Start difference. First operand has 132 places, 255 transitions, 3310 flow. Second operand 48 states and 1240 transitions. [2023-11-29 02:25:30,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1714 transitions, 19054 flow [2023-11-29 02:25:30,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1714 transitions, 17106 flow, removed 951 selfloop flow, removed 4 redundant places. [2023-11-29 02:25:31,002 INFO L231 Difference]: Finished difference. Result has 220 places, 871 transitions, 12966 flow [2023-11-29 02:25:31,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12966, PETRI_PLACES=220, PETRI_TRANSITIONS=871} [2023-11-29 02:25:31,003 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 181 predicate places. [2023-11-29 02:25:31,003 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 871 transitions, 12966 flow [2023-11-29 02:25:31,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 18.040816326530614) internal successors, (884), 49 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:31,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:25:31,004 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2023-11-29 02:25:31,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:25:31,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:25:31,205 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:25:31,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:25:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2070827585, now seen corresponding path program 4 times [2023-11-29 02:25:31,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:25:31,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119781690] [2023-11-29 02:25:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:25:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:25:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:25:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:25:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119781690] [2023-11-29 02:25:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119781690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:25:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759602427] [2023-11-29 02:25:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:25:32,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:25:32,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:25:32,993 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:25:32,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:25:33,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:25:33,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:25:33,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 02:25:33,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:25:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:33,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:25:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:25:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759602427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:25:35,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:25:35,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-29 02:25:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62507216] [2023-11-29 02:25:35,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:25:35,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 02:25:35,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:25:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 02:25:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 02:25:35,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:25:35,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 871 transitions, 12966 flow. Second operand has 97 states, 97 states have (on average 18.02061855670103) internal successors, (1748), 97 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:25:35,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:25:35,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:25:35,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:32,988 INFO L124 PetriNetUnfolderBase]: 60613/142650 cut-off events. [2023-11-29 02:26:32,988 INFO L125 PetriNetUnfolderBase]: For 6140655/6150157 co-relation queries the response was YES. [2023-11-29 02:26:34,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539680 conditions, 142650 events. 60613/142650 cut-off events. For 6140655/6150157 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 1368885 event pairs, 4633 based on Foata normal form. 5134/147769 useless extension candidates. Maximal degree in co-relation 539582. Up to 23039 conditions per place. [2023-11-29 02:26:35,037 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 1739 selfloop transitions, 3213 changer transitions 0/4970 dead transitions. [2023-11-29 02:26:35,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 4970 transitions, 63890 flow [2023-11-29 02:26:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 02:26:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-11-29 02:26:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 2488 transitions. [2023-11-29 02:26:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7004504504504504 [2023-11-29 02:26:35,043 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 2488 transitions. [2023-11-29 02:26:35,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 2488 transitions. [2023-11-29 02:26:35,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:35,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 2488 transitions. [2023-11-29 02:26:35,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 25.916666666666668) internal successors, (2488), 96 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 37.0) internal successors, (3589), 97 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,055 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 37.0) internal successors, (3589), 97 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,056 INFO L175 Difference]: Start difference. First operand has 220 places, 871 transitions, 12966 flow. Second operand 96 states and 2488 transitions. [2023-11-29 02:26:35,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 4970 transitions, 63890 flow [2023-11-29 02:26:39,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 4970 transitions, 56289 flow, removed 3645 selfloop flow, removed 10 redundant places. [2023-11-29 02:26:39,487 INFO L231 Difference]: Finished difference. Result has 398 places, 3263 transitions, 51070 flow [2023-11-29 02:26:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12263, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=51070, PETRI_PLACES=398, PETRI_TRANSITIONS=3263} [2023-11-29 02:26:39,488 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 359 predicate places. [2023-11-29 02:26:39,489 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 3263 transitions, 51070 flow [2023-11-29 02:26:39,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 18.02061855670103) internal successors, (1748), 97 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:39,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:39,490 INFO L208 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1, 1] [2023-11-29 02:26:39,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:26:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:26:39,691 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 02:26:39,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2132837055, now seen corresponding path program 5 times [2023-11-29 02:26:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943318999] [2023-11-29 02:26:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:45,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:45,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943318999] [2023-11-29 02:26:45,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943318999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205310082] [2023-11-29 02:26:45,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:26:45,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:45,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:45,541 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:45,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc24d76c-1677-432d-88e5-9e5c8299a02b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:26:46,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2023-11-29 02:26:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:26:46,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 02:26:46,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:46,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205310082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:26:55,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:26:55,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-11-29 02:26:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765423641] [2023-11-29 02:26:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-29 02:26:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-29 02:26:55,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 02:26:55,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2023-11-29 02:26:55,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 3263 transitions, 51070 flow. Second operand has 193 states, 193 states have (on average 18.010362694300518) internal successors, (3476), 193 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:55,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:55,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2023-11-29 02:26:55,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand