./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:52:17,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:52:17,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:52:18,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:52:18,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:52:18,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:52:18,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:52:18,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:52:18,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:52:18,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:52:18,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:52:18,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:52:18,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:52:18,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:52:18,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:52:18,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:52:18,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:52:18,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:52:18,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:52:18,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:52:18,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:52:18,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:52:18,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:52:18,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:52:18,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:52:18,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:52:18,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:52:18,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:52:18,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:52:18,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:52:18,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:52:18,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:52:18,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:52:18,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:52:18,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:52:18,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:52:18,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:52:18,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:52:18,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:52:18,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:52:18,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:52:18,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:52:18,129 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:52:18,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:52:18,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:52:18,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:52:18,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:52:18,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:52:18,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:52:18,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:52:18,133 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:52:18,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:52:18,134 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:52:18,134 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:52:18,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:52:18,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:52:18,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:52:18,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:52:18,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:52:18,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:52:18,136 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:52:18,136 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:52:18,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:52:18,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:52:18,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:52:18,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:52:18,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:52:18,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:52:18,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:18,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:52:18,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:52:18,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:52:18,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:52:18,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:52:18,139 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:52:18,140 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:52:18,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:52:18,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-16 12:52:18,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:52:18,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:52:18,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:52:18,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:52:18,492 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:52:18,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-16 12:52:18,582 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/data/93e54ed63/500bb58851644363b75c880f53474511/FLAGf793e3de1 [2022-11-16 12:52:19,154 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:52:19,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-16 12:52:19,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/data/93e54ed63/500bb58851644363b75c880f53474511/FLAGf793e3de1 [2022-11-16 12:52:19,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/data/93e54ed63/500bb58851644363b75c880f53474511 [2022-11-16 12:52:19,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:52:19,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:52:19,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:19,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:52:19,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:52:19,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:19,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1312c108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19, skipping insertion in model container [2022-11-16 12:52:19,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:19,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:52:19,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:52:19,879 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-16 12:52:19,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:19,894 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:52:19,937 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-16 12:52:19,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:19,960 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:52:19,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19 WrapperNode [2022-11-16 12:52:19,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:19,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:19,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:52:19,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:52:19,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:19,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,032 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-16 12:52:20,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:20,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:52:20,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:52:20,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:52:20,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:52:20,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:52:20,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:52:20,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:52:20,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (1/1) ... [2022-11-16 12:52:20,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:20,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:52:20,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:52:20,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:52:20,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:52:20,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:52:20,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:52:20,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:52:20,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:52:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:52:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:52:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:52:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:52:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:52:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:52:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:52:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:52:20,228 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:52:20,379 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:52:20,381 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:52:20,691 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:52:20,839 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:52:20,839 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:52:20,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:20 BoogieIcfgContainer [2022-11-16 12:52:20,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:52:20,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:52:20,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:52:20,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:52:20,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:52:19" (1/3) ... [2022-11-16 12:52:20,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f18c82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:20, skipping insertion in model container [2022-11-16 12:52:20,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:19" (2/3) ... [2022-11-16 12:52:20,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f18c82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:20, skipping insertion in model container [2022-11-16 12:52:20,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:20" (3/3) ... [2022-11-16 12:52:20,859 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-16 12:52:20,870 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:52:20,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:52:20,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 12:52:20,883 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:52:20,987 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:52:21,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-16 12:52:21,113 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-16 12:52:21,115 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:52:21,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-16 12:52:21,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 99 transitions, 214 flow [2022-11-16 12:52:21,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 79 transitions, 170 flow [2022-11-16 12:52:21,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:52:21,149 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=LoopsAndPotentialCycles, 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;@650e8f55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:52:21,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-16 12:52:21,163 INFO L130 PetriNetUnfolder]: 2/42 cut-off events. [2022-11-16 12:52:21,168 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:52:21,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:21,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:21,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1185055160, now seen corresponding path program 1 times [2022-11-16 12:52:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:21,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690464299] [2022-11-16 12:52:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:21,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:21,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:21,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690464299] [2022-11-16 12:52:21,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690464299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:21,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:21,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303006845] [2022-11-16 12:52:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:21,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:21,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:21,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:21,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:21,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:21,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:21,996 INFO L130 PetriNetUnfolder]: 28/160 cut-off events. [2022-11-16 12:52:21,997 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-16 12:52:21,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 160 events. 28/160 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 11 based on Foata normal form. 16/137 useless extension candidates. Maximal degree in co-relation 129. Up to 47 conditions per place. [2022-11-16 12:52:22,003 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 15 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2022-11-16 12:52:22,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 215 flow [2022-11-16 12:52:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-11-16 12:52:22,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9057239057239057 [2022-11-16 12:52:22,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-11-16 12:52:22,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-11-16 12:52:22,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:22,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-11-16 12:52:22,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,049 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 170 flow. Second operand 3 states and 269 transitions. [2022-11-16 12:52:22,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 215 flow [2022-11-16 12:52:22,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 201 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:52:22,061 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 172 flow [2022-11-16 12:52:22,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2022-11-16 12:52:22,071 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2022-11-16 12:52:22,072 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 172 flow [2022-11-16 12:52:22,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:22,073 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:22,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:52:22,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash 671686075, now seen corresponding path program 1 times [2022-11-16 12:52:22,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:22,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277341543] [2022-11-16 12:52:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:22,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:22,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277341543] [2022-11-16 12:52:22,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277341543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:22,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:22,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030503928] [2022-11-16 12:52:22,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:22,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:22,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-16 12:52:22,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:22,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-16 12:52:22,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:22,559 INFO L130 PetriNetUnfolder]: 171/416 cut-off events. [2022-11-16 12:52:22,560 INFO L131 PetriNetUnfolder]: For 43/50 co-relation queries the response was YES. [2022-11-16 12:52:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 416 events. 171/416 cut-off events. For 43/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2012 event pairs, 26 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 693. Up to 205 conditions per place. [2022-11-16 12:52:22,571 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-11-16 12:52:22,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 335 flow [2022-11-16 12:52:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:52:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:52:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2022-11-16 12:52:22,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8242424242424242 [2022-11-16 12:52:22,580 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2022-11-16 12:52:22,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2022-11-16 12:52:22,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:22,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2022-11-16 12:52:22,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,591 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 172 flow. Second operand 5 states and 408 transitions. [2022-11-16 12:52:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 335 flow [2022-11-16 12:52:22,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:22,597 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 200 flow [2022-11-16 12:52:22,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2022-11-16 12:52:22,599 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 3 predicate places. [2022-11-16 12:52:22,599 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 200 flow [2022-11-16 12:52:22,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:22,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:22,601 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:22,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:52:22,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832319, now seen corresponding path program 1 times [2022-11-16 12:52:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:22,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868625373] [2022-11-16 12:52:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:22,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868625373] [2022-11-16 12:52:22,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868625373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754446076] [2022-11-16 12:52:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:22,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:22,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:52:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:22,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:23,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754446076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:23,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:23,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:52:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456698393] [2022-11-16 12:52:23,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:23,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:23,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:23,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:23,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:23,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:23,303 INFO L130 PetriNetUnfolder]: 100/480 cut-off events. [2022-11-16 12:52:23,304 INFO L131 PetriNetUnfolder]: For 82/109 co-relation queries the response was YES. [2022-11-16 12:52:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 480 events. 100/480 cut-off events. For 82/109 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2448 event pairs, 5 based on Foata normal form. 6/391 useless extension candidates. Maximal degree in co-relation 649. Up to 101 conditions per place. [2022-11-16 12:52:23,309 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 31 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2022-11-16 12:52:23,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 411 flow [2022-11-16 12:52:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-11-16 12:52:23,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8932178932178932 [2022-11-16 12:52:23,312 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-11-16 12:52:23,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-11-16 12:52:23,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:23,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-11-16 12:52:23,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:23,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:23,341 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:23,341 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 200 flow. Second operand 7 states and 619 transitions. [2022-11-16 12:52:23,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 411 flow [2022-11-16 12:52:23,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:23,346 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 357 flow [2022-11-16 12:52:23,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2022-11-16 12:52:23,347 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-11-16 12:52:23,347 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 357 flow [2022-11-16 12:52:23,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:23,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:23,348 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:23,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:23,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:23,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832320, now seen corresponding path program 1 times [2022-11-16 12:52:23,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:23,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913452802] [2022-11-16 12:52:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:23,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:23,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913452802] [2022-11-16 12:52:23,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913452802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:23,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460415902] [2022-11-16 12:52:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:23,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:23,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:23,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:23,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:52:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:23,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:23,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:23,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460415902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:23,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:23,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-16 12:52:23,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948662376] [2022-11-16 12:52:23,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:23,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:23,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:23,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:23,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:23,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:23,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:24,108 INFO L130 PetriNetUnfolder]: 98/552 cut-off events. [2022-11-16 12:52:24,108 INFO L131 PetriNetUnfolder]: For 926/1209 co-relation queries the response was YES. [2022-11-16 12:52:24,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 552 events. 98/552 cut-off events. For 926/1209 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3106 event pairs, 2 based on Foata normal form. 39/513 useless extension candidates. Maximal degree in co-relation 759. Up to 100 conditions per place. [2022-11-16 12:52:24,114 INFO L137 encePairwiseOnDemand]: 91/99 looper letters, 16 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2022-11-16 12:52:24,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 461 flow [2022-11-16 12:52:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2022-11-16 12:52:24,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-16 12:52:24,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 342 transitions. [2022-11-16 12:52:24,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 342 transitions. [2022-11-16 12:52:24,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:24,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 342 transitions. [2022-11-16 12:52:24,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,121 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,121 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 357 flow. Second operand 4 states and 342 transitions. [2022-11-16 12:52:24,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 461 flow [2022-11-16 12:52:24,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 447 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:24,134 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 453 flow [2022-11-16 12:52:24,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2022-11-16 12:52:24,137 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2022-11-16 12:52:24,137 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 453 flow [2022-11-16 12:52:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:24,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:24,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:24,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-16 12:52:24,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1250225610, now seen corresponding path program 1 times [2022-11-16 12:52:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504303863] [2022-11-16 12:52:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504303863] [2022-11-16 12:52:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504303863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:24,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:24,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272511530] [2022-11-16 12:52:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:24,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 99 [2022-11-16 12:52:24,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:24,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 99 [2022-11-16 12:52:24,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:24,599 INFO L130 PetriNetUnfolder]: 143/729 cut-off events. [2022-11-16 12:52:24,600 INFO L131 PetriNetUnfolder]: For 2120/2643 co-relation queries the response was YES. [2022-11-16 12:52:24,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 729 events. 143/729 cut-off events. For 2120/2643 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4748 event pairs, 44 based on Foata normal form. 17/592 useless extension candidates. Maximal degree in co-relation 1143. Up to 229 conditions per place. [2022-11-16 12:52:24,608 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 42 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-11-16 12:52:24,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 666 flow [2022-11-16 12:52:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-16 12:52:24,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8754208754208754 [2022-11-16 12:52:24,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-16 12:52:24,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-16 12:52:24,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:24,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-16 12:52:24,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,615 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 453 flow. Second operand 3 states and 260 transitions. [2022-11-16 12:52:24,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 666 flow [2022-11-16 12:52:24,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 110 transitions, 605 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:24,627 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 479 flow [2022-11-16 12:52:24,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2022-11-16 12:52:24,630 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 19 predicate places. [2022-11-16 12:52:24,630 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 479 flow [2022-11-16 12:52:24,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:24,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:24,631 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:24,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:52:24,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 44078018, now seen corresponding path program 1 times [2022-11-16 12:52:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:24,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155473788] [2022-11-16 12:52:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155473788] [2022-11-16 12:52:24,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155473788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926128963] [2022-11-16 12:52:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:24,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:24,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:52:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:24,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926128963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:25,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:25,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:52:25,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486908916] [2022-11-16 12:52:25,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:25,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:52:25,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:52:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:52:25,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-16 12:52:25,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:25,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-16 12:52:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:25,838 INFO L130 PetriNetUnfolder]: 730/2013 cut-off events. [2022-11-16 12:52:25,839 INFO L131 PetriNetUnfolder]: For 5108/5158 co-relation queries the response was YES. [2022-11-16 12:52:25,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 2013 events. 730/2013 cut-off events. For 5108/5158 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 14206 event pairs, 31 based on Foata normal form. 104/1737 useless extension candidates. Maximal degree in co-relation 5363. Up to 633 conditions per place. [2022-11-16 12:52:25,858 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 277 selfloop transitions, 18 changer transitions 0/348 dead transitions. [2022-11-16 12:52:25,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 348 transitions, 3356 flow [2022-11-16 12:52:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:52:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:52:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1430 transitions. [2022-11-16 12:52:25,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8024691358024691 [2022-11-16 12:52:25,864 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1430 transitions. [2022-11-16 12:52:25,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1430 transitions. [2022-11-16 12:52:25,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:25,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1430 transitions. [2022-11-16 12:52:25,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.44444444444444) internal successors, (1430), 18 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,875 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 99.0) internal successors, (1881), 19 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,876 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 479 flow. Second operand 18 states and 1430 transitions. [2022-11-16 12:52:25,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 348 transitions, 3356 flow [2022-11-16 12:52:25,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 348 transitions, 3333 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:25,898 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 580 flow [2022-11-16 12:52:25,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=580, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2022-11-16 12:52:25,902 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 39 predicate places. [2022-11-16 12:52:25,902 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 580 flow [2022-11-16 12:52:25,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 74.66666666666667) internal successors, (896), 12 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:25,903 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:25,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:26,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:26,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1366418868, now seen corresponding path program 1 times [2022-11-16 12:52:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:26,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908595533] [2022-11-16 12:52:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:26,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908595533] [2022-11-16 12:52:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908595533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410810167] [2022-11-16 12:52:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:26,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:26,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:52:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:26,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:26,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410810167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:26,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:26,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:52:26,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324220569] [2022-11-16 12:52:26,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:26,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:52:26,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:52:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:52:26,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 99 [2022-11-16 12:52:26,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:26,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 99 [2022-11-16 12:52:26,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:26,826 INFO L130 PetriNetUnfolder]: 655/1819 cut-off events. [2022-11-16 12:52:26,827 INFO L131 PetriNetUnfolder]: For 5187/5272 co-relation queries the response was YES. [2022-11-16 12:52:26,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1819 events. 655/1819 cut-off events. For 5187/5272 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12603 event pairs, 101 based on Foata normal form. 134/1599 useless extension candidates. Maximal degree in co-relation 5717. Up to 641 conditions per place. [2022-11-16 12:52:26,866 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 87 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-16 12:52:26,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 1130 flow [2022-11-16 12:52:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 553 transitions. [2022-11-16 12:52:26,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2022-11-16 12:52:26,870 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 553 transitions. [2022-11-16 12:52:26,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 553 transitions. [2022-11-16 12:52:26,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:26,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 553 transitions. [2022-11-16 12:52:26,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,874 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,874 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 580 flow. Second operand 7 states and 553 transitions. [2022-11-16 12:52:26,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 1130 flow [2022-11-16 12:52:26,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1098 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:26,895 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 543 flow [2022-11-16 12:52:26,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2022-11-16 12:52:26,896 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 35 predicate places. [2022-11-16 12:52:26,897 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 543 flow [2022-11-16 12:52:26,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:26,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:26,899 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:26,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 12:52:27,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:27,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1505486264, now seen corresponding path program 1 times [2022-11-16 12:52:27,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185999342] [2022-11-16 12:52:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:27,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185999342] [2022-11-16 12:52:27,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185999342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624193377] [2022-11-16 12:52:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:27,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:27,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:27,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:52:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:27,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:27,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:27,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624193377] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:27,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:52:27,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-16 12:52:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656133864] [2022-11-16 12:52:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:27,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:27,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:52:27,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 99 [2022-11-16 12:52:27,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 543 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:27,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 99 [2022-11-16 12:52:27,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:27,804 INFO L130 PetriNetUnfolder]: 220/1082 cut-off events. [2022-11-16 12:52:27,804 INFO L131 PetriNetUnfolder]: For 2446/3042 co-relation queries the response was YES. [2022-11-16 12:52:27,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 1082 events. 220/1082 cut-off events. For 2446/3042 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8211 event pairs, 105 based on Foata normal form. 26/858 useless extension candidates. Maximal degree in co-relation 2092. Up to 455 conditions per place. [2022-11-16 12:52:27,814 INFO L137 encePairwiseOnDemand]: 95/99 looper letters, 38 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2022-11-16 12:52:27,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 112 transitions, 640 flow [2022-11-16 12:52:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2022-11-16 12:52:27,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8257575757575758 [2022-11-16 12:52:27,817 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2022-11-16 12:52:27,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2022-11-16 12:52:27,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:27,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2022-11-16 12:52:27,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,821 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,821 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 543 flow. Second operand 4 states and 327 transitions. [2022-11-16 12:52:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 112 transitions, 640 flow [2022-11-16 12:52:27,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 112 transitions, 626 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:27,832 INFO L231 Difference]: Finished difference. Result has 115 places, 106 transitions, 520 flow [2022-11-16 12:52:27,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=115, PETRI_TRANSITIONS=106} [2022-11-16 12:52:27,835 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 34 predicate places. [2022-11-16 12:52:27,835 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 106 transitions, 520 flow [2022-11-16 12:52:27,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:27,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:27,836 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:27,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:28,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:52:28,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash -7855593, now seen corresponding path program 1 times [2022-11-16 12:52:28,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:28,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126288739] [2022-11-16 12:52:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:28,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:28,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:28,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126288739] [2022-11-16 12:52:28,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126288739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:28,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669969773] [2022-11-16 12:52:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:28,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:28,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:28,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:52:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:28,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:28,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669969773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:28,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:28,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 12:52:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518452228] [2022-11-16 12:52:28,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:52:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:52:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:52:28,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 99 [2022-11-16 12:52:28,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 106 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:28,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 99 [2022-11-16 12:52:28,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:28,833 INFO L130 PetriNetUnfolder]: 250/1331 cut-off events. [2022-11-16 12:52:28,834 INFO L131 PetriNetUnfolder]: For 2631/3024 co-relation queries the response was YES. [2022-11-16 12:52:28,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3133 conditions, 1331 events. 250/1331 cut-off events. For 2631/3024 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10814 event pairs, 64 based on Foata normal form. 75/1144 useless extension candidates. Maximal degree in co-relation 2909. Up to 237 conditions per place. [2022-11-16 12:52:28,846 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 64 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2022-11-16 12:52:28,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 879 flow [2022-11-16 12:52:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:52:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:52:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2022-11-16 12:52:28,849 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7474747474747475 [2022-11-16 12:52:28,849 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 592 transitions. [2022-11-16 12:52:28,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 592 transitions. [2022-11-16 12:52:28,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:28,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 592 transitions. [2022-11-16 12:52:28,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.0) internal successors, (592), 8 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) [2022-11-16 12:52:28,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,854 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 99.0) internal successors, (891), 9 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,854 INFO L175 Difference]: Start difference. First operand has 115 places, 106 transitions, 520 flow. Second operand 8 states and 592 transitions. [2022-11-16 12:52:28,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 879 flow [2022-11-16 12:52:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 145 transitions, 865 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:28,864 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 582 flow [2022-11-16 12:52:28,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2022-11-16 12:52:28,865 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 40 predicate places. [2022-11-16 12:52:28,866 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 582 flow [2022-11-16 12:52:28,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.625) internal successors, (565), 8 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:28,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:28,866 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:28,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:29,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:29,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1688134863, now seen corresponding path program 1 times [2022-11-16 12:52:29,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:29,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514614551] [2022-11-16 12:52:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:29,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514614551] [2022-11-16 12:52:29,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514614551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:29,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:29,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:52:29,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649699420] [2022-11-16 12:52:29,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:29,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:52:29,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:52:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:52:29,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-16 12:52:29,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:29,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-16 12:52:29,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:29,831 INFO L130 PetriNetUnfolder]: 701/2301 cut-off events. [2022-11-16 12:52:29,831 INFO L131 PetriNetUnfolder]: For 5053/5077 co-relation queries the response was YES. [2022-11-16 12:52:29,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 2301 events. 701/2301 cut-off events. For 5053/5077 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 17746 event pairs, 456 based on Foata normal form. 24/2155 useless extension candidates. Maximal degree in co-relation 6240. Up to 1451 conditions per place. [2022-11-16 12:52:29,858 INFO L137 encePairwiseOnDemand]: 93/99 looper letters, 63 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2022-11-16 12:52:29,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 118 transitions, 791 flow [2022-11-16 12:52:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:52:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:52:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2022-11-16 12:52:29,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2022-11-16 12:52:29,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 377 transitions. [2022-11-16 12:52:29,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 377 transitions. [2022-11-16 12:52:29,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:29,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 377 transitions. [2022-11-16 12:52:29,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,902 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,902 INFO L175 Difference]: Start difference. First operand has 121 places, 108 transitions, 582 flow. Second operand 6 states and 377 transitions. [2022-11-16 12:52:29,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 118 transitions, 791 flow [2022-11-16 12:52:29,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 775 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-16 12:52:29,914 INFO L231 Difference]: Finished difference. Result has 124 places, 108 transitions, 582 flow [2022-11-16 12:52:29,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=108} [2022-11-16 12:52:29,915 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-16 12:52:29,915 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 108 transitions, 582 flow [2022-11-16 12:52:29,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:29,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:29,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:29,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:52:29,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash -825592294, now seen corresponding path program 1 times [2022-11-16 12:52:29,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:29,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200240953] [2022-11-16 12:52:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:29,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:30,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200240953] [2022-11-16 12:52:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200240953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014836706] [2022-11-16 12:52:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:30,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:30,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:30,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:30,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:52:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:30,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:52:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:30,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:30,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014836706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:30,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:30,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-16 12:52:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413239773] [2022-11-16 12:52:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:30,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:52:30,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2022-11-16 12:52:30,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 108 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:30,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:30,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2022-11-16 12:52:30,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:31,236 INFO L130 PetriNetUnfolder]: 448/1819 cut-off events. [2022-11-16 12:52:31,237 INFO L131 PetriNetUnfolder]: For 3018/3040 co-relation queries the response was YES. [2022-11-16 12:52:31,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4834 conditions, 1819 events. 448/1819 cut-off events. For 3018/3040 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 14721 event pairs, 295 based on Foata normal form. 22/1746 useless extension candidates. Maximal degree in co-relation 4544. Up to 980 conditions per place. [2022-11-16 12:52:31,259 INFO L137 encePairwiseOnDemand]: 92/99 looper letters, 43 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2022-11-16 12:52:31,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 107 transitions, 678 flow [2022-11-16 12:52:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2022-11-16 12:52:31,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6132756132756133 [2022-11-16 12:52:31,262 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 425 transitions. [2022-11-16 12:52:31,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 425 transitions. [2022-11-16 12:52:31,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:31,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 425 transitions. [2022-11-16 12:52:31,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.714285714285715) internal successors, (425), 7 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,266 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,266 INFO L175 Difference]: Start difference. First operand has 124 places, 108 transitions, 582 flow. Second operand 7 states and 425 transitions. [2022-11-16 12:52:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 107 transitions, 678 flow [2022-11-16 12:52:31,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 107 transitions, 668 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:31,280 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 582 flow [2022-11-16 12:52:31,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=582, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2022-11-16 12:52:31,281 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2022-11-16 12:52:31,282 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 582 flow [2022-11-16 12:52:31,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:31,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:31,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:31,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:52:31,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash 176442899, now seen corresponding path program 1 times [2022-11-16 12:52:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:31,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923069220] [2022-11-16 12:52:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:31,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923069220] [2022-11-16 12:52:31,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923069220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142162070] [2022-11-16 12:52:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:31,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:31,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:31,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:31,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:52:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:31,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:31,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:32,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142162070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:32,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:32,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-16 12:52:32,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246748312] [2022-11-16 12:52:32,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:32,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:52:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:52:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:52:32,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-16 12:52:32,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 582 flow. Second operand has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:32,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-16 12:52:32,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:32,947 INFO L130 PetriNetUnfolder]: 822/2661 cut-off events. [2022-11-16 12:52:32,948 INFO L131 PetriNetUnfolder]: For 5882/5882 co-relation queries the response was YES. [2022-11-16 12:52:32,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7685 conditions, 2661 events. 822/2661 cut-off events. For 5882/5882 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 21071 event pairs, 183 based on Foata normal form. 37/2682 useless extension candidates. Maximal degree in co-relation 7616. Up to 962 conditions per place. [2022-11-16 12:52:32,974 INFO L137 encePairwiseOnDemand]: 88/99 looper letters, 114 selfloop transitions, 23 changer transitions 17/200 dead transitions. [2022-11-16 12:52:32,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 200 transitions, 1584 flow [2022-11-16 12:52:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:52:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:52:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 939 transitions. [2022-11-16 12:52:32,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6774891774891775 [2022-11-16 12:52:32,983 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 939 transitions. [2022-11-16 12:52:32,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 939 transitions. [2022-11-16 12:52:32,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:32,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 939 transitions. [2022-11-16 12:52:32,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 67.07142857142857) internal successors, (939), 14 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,992 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 99.0) internal successors, (1485), 15 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,992 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 582 flow. Second operand 14 states and 939 transitions. [2022-11-16 12:52:32,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 200 transitions, 1584 flow [2022-11-16 12:52:33,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1573 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:33,017 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 791 flow [2022-11-16 12:52:33,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=791, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2022-11-16 12:52:33,018 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 55 predicate places. [2022-11-16 12:52:33,018 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 791 flow [2022-11-16 12:52:33,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.86666666666666) internal successors, (973), 15 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:33,019 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:33,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:33,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:52:33,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1218228744, now seen corresponding path program 2 times [2022-11-16 12:52:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179979906] [2022-11-16 12:52:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:33,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179979906] [2022-11-16 12:52:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179979906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515311335] [2022-11-16 12:52:33,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:52:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:33,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:33,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:33,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:52:33,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:52:33,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:33,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:52:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:33,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:33,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515311335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:33,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:33,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 12:52:33,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291710581] [2022-11-16 12:52:33,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:33,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:52:33,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:52:33,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:52:33,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:33,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 791 flow. Second operand has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:33,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:33,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:33,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:34,154 INFO L130 PetriNetUnfolder]: 228/1624 cut-off events. [2022-11-16 12:52:34,154 INFO L131 PetriNetUnfolder]: For 8007/8439 co-relation queries the response was YES. [2022-11-16 12:52:34,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 1624 events. 228/1624 cut-off events. For 8007/8439 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11879 event pairs, 11 based on Foata normal form. 285/1885 useless extension candidates. Maximal degree in co-relation 4776. Up to 194 conditions per place. [2022-11-16 12:52:34,170 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 47 selfloop transitions, 78 changer transitions 0/206 dead transitions. [2022-11-16 12:52:34,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 206 transitions, 1993 flow [2022-11-16 12:52:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:52:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 12:52:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1110 transitions. [2022-11-16 12:52:34,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8624708624708625 [2022-11-16 12:52:34,174 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1110 transitions. [2022-11-16 12:52:34,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1110 transitions. [2022-11-16 12:52:34,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:34,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1110 transitions. [2022-11-16 12:52:34,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.38461538461539) internal successors, (1110), 13 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,182 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,182 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 791 flow. Second operand 13 states and 1110 transitions. [2022-11-16 12:52:34,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 206 transitions, 1993 flow [2022-11-16 12:52:34,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 1978 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-11-16 12:52:34,205 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2065 flow [2022-11-16 12:52:34,206 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2065, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2022-11-16 12:52:34,207 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 69 predicate places. [2022-11-16 12:52:34,207 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2065 flow [2022-11-16 12:52:34,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.3076923076923) internal successors, (1057), 13 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:34,208 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:34,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:34,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:52:34,414 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:34,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1808259579, now seen corresponding path program 2 times [2022-11-16 12:52:34,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:34,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251341935] [2022-11-16 12:52:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:34,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:34,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:34,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251341935] [2022-11-16 12:52:34,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251341935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:34,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175349370] [2022-11-16 12:52:34,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:52:34,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:34,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:34,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:34,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:52:34,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:52:34,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:52:34,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:52:34,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175349370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:34,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:34,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-16 12:52:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061562636] [2022-11-16 12:52:34,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:52:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:52:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:52:34,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2022-11-16 12:52:34,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2065 flow. Second operand has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:34,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2022-11-16 12:52:34,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:36,319 INFO L130 PetriNetUnfolder]: 1088/3161 cut-off events. [2022-11-16 12:52:36,319 INFO L131 PetriNetUnfolder]: For 40131/40935 co-relation queries the response was YES. [2022-11-16 12:52:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15094 conditions, 3161 events. 1088/3161 cut-off events. For 40131/40935 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 22434 event pairs, 19 based on Foata normal form. 435/3591 useless extension candidates. Maximal degree in co-relation 15017. Up to 943 conditions per place. [2022-11-16 12:52:36,363 INFO L137 encePairwiseOnDemand]: 90/99 looper letters, 454 selfloop transitions, 25 changer transitions 6/536 dead transitions. [2022-11-16 12:52:36,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 536 transitions, 8265 flow [2022-11-16 12:52:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:52:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:52:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1450 transitions. [2022-11-16 12:52:36,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6657483930211203 [2022-11-16 12:52:36,371 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1450 transitions. [2022-11-16 12:52:36,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1450 transitions. [2022-11-16 12:52:36,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:36,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1450 transitions. [2022-11-16 12:52:36,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.9090909090909) internal successors, (1450), 22 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:36,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:36,383 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:36,384 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2065 flow. Second operand 22 states and 1450 transitions. [2022-11-16 12:52:36,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 536 transitions, 8265 flow [2022-11-16 12:52:36,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 536 transitions, 7623 flow, removed 298 selfloop flow, removed 6 redundant places. [2022-11-16 12:52:36,456 INFO L231 Difference]: Finished difference. Result has 165 places, 188 transitions, 1899 flow [2022-11-16 12:52:36,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1899, PETRI_PLACES=165, PETRI_TRANSITIONS=188} [2022-11-16 12:52:36,457 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 84 predicate places. [2022-11-16 12:52:36,457 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 188 transitions, 1899 flow [2022-11-16 12:52:36,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:36,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:36,458 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:36,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:36,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:36,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1008065624, now seen corresponding path program 3 times [2022-11-16 12:52:36,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:36,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865078404] [2022-11-16 12:52:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:36,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:37,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:37,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865078404] [2022-11-16 12:52:37,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865078404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:37,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294971133] [2022-11-16 12:52:37,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:52:37,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:37,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:37,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:52:37,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:52:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:52:37,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:37,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294971133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:37,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:37,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 12:52:37,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654196951] [2022-11-16 12:52:37,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:37,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:52:37,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:52:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:52:37,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:37,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 188 transitions, 1899 flow. Second operand has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:37,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:37,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:37,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:39,053 INFO L130 PetriNetUnfolder]: 566/4020 cut-off events. [2022-11-16 12:52:39,054 INFO L131 PetriNetUnfolder]: For 48273/49614 co-relation queries the response was YES. [2022-11-16 12:52:39,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12917 conditions, 4020 events. 566/4020 cut-off events. For 48273/49614 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 32655 event pairs, 11 based on Foata normal form. 903/4887 useless extension candidates. Maximal degree in co-relation 12845. Up to 516 conditions per place. [2022-11-16 12:52:39,099 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 73 selfloop transitions, 284 changer transitions 0/442 dead transitions. [2022-11-16 12:52:39,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 442 transitions, 5442 flow [2022-11-16 12:52:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:52:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-16 12:52:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2142 transitions. [2022-11-16 12:52:39,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654545454545455 [2022-11-16 12:52:39,104 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2142 transitions. [2022-11-16 12:52:39,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2142 transitions. [2022-11-16 12:52:39,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:39,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2142 transitions. [2022-11-16 12:52:39,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 85.68) internal successors, (2142), 25 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,195 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 99.0) internal successors, (2574), 26 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,195 INFO L175 Difference]: Start difference. First operand has 165 places, 188 transitions, 1899 flow. Second operand 25 states and 2142 transitions. [2022-11-16 12:52:39,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 442 transitions, 5442 flow [2022-11-16 12:52:39,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 442 transitions, 5382 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-11-16 12:52:39,266 INFO L231 Difference]: Finished difference. Result has 196 places, 398 transitions, 5843 flow [2022-11-16 12:52:39,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5843, PETRI_PLACES=196, PETRI_TRANSITIONS=398} [2022-11-16 12:52:39,268 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 115 predicate places. [2022-11-16 12:52:39,268 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 398 transitions, 5843 flow [2022-11-16 12:52:39,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.16) internal successors, (2029), 25 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:39,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:39,270 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:39,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:39,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:52:39,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -883355368, now seen corresponding path program 4 times [2022-11-16 12:52:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:39,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910079172] [2022-11-16 12:52:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:39,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910079172] [2022-11-16 12:52:40,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910079172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715272564] [2022-11-16 12:52:40,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:52:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:40,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:40,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:52:40,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:52:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:52:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:42,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715272564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:42,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:42,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-16 12:52:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37734667] [2022-11-16 12:52:42,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:52:42,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:52:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:52:42,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:42,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 398 transitions, 5843 flow. Second operand has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:42,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:42,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:42,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:46,196 INFO L130 PetriNetUnfolder]: 1423/10047 cut-off events. [2022-11-16 12:52:46,196 INFO L131 PetriNetUnfolder]: For 576294/581213 co-relation queries the response was YES. [2022-11-16 12:52:46,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33683 conditions, 10047 events. 1423/10047 cut-off events. For 576294/581213 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 87875 event pairs, 11 based on Foata normal form. 2927/12914 useless extension candidates. Maximal degree in co-relation 33589. Up to 1574 conditions per place. [2022-11-16 12:52:46,349 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 123 selfloop transitions, 996 changer transitions 0/1204 dead transitions. [2022-11-16 12:52:46,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1204 transitions, 19086 flow [2022-11-16 12:52:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:52:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 12:52:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4206 transitions. [2022-11-16 12:52:46,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8670377241805813 [2022-11-16 12:52:46,360 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4206 transitions. [2022-11-16 12:52:46,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4206 transitions. [2022-11-16 12:52:46,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:46,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4206 transitions. [2022-11-16 12:52:46,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 85.83673469387755) internal successors, (4206), 49 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:46,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:46,386 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 99.0) internal successors, (4950), 50 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:46,386 INFO L175 Difference]: Start difference. First operand has 196 places, 398 transitions, 5843 flow. Second operand 49 states and 4206 transitions. [2022-11-16 12:52:46,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1204 transitions, 19086 flow [2022-11-16 12:52:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1204 transitions, 16354 flow, removed 1327 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:46,859 INFO L231 Difference]: Finished difference. Result has 285 places, 1112 transitions, 18163 flow [2022-11-16 12:52:46,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18163, PETRI_PLACES=285, PETRI_TRANSITIONS=1112} [2022-11-16 12:52:46,860 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 204 predicate places. [2022-11-16 12:52:46,861 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1112 transitions, 18163 flow [2022-11-16 12:52:46,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.08163265306122) internal successors, (3973), 49 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:46,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:46,863 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:46,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:47,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:47,070 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:52:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1346381160, now seen corresponding path program 5 times [2022-11-16 12:52:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:47,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038752806] [2022-11-16 12:52:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:47,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:50,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:50,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038752806] [2022-11-16 12:52:50,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038752806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:50,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177987007] [2022-11-16 12:52:50,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:52:50,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:50,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:50,285 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:52:50,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-16 12:52:50,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 12:52:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:51,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:55,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177987007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:55,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:55,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-16 12:52:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322156822] [2022-11-16 12:52:55,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:55,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-16 12:52:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-16 12:52:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:52:55,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:52:55,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1112 transitions, 18163 flow. Second operand has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:55,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:55,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:52:55,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:14,227 INFO L130 PetriNetUnfolder]: 4297/29347 cut-off events. [2022-11-16 12:53:14,228 INFO L131 PetriNetUnfolder]: For 5757002/5776144 co-relation queries the response was YES. [2022-11-16 12:53:14,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100456 conditions, 29347 events. 4297/29347 cut-off events. For 5757002/5776144 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 288979 event pairs, 11 based on Foata normal form. 10645/39884 useless extension candidates. Maximal degree in co-relation 100319. Up to 4866 conditions per place. [2022-11-16 12:53:14,721 INFO L137 encePairwiseOnDemand]: 94/99 looper letters, 221 selfloop transitions, 3580 changer transitions 0/3886 dead transitions. [2022-11-16 12:53:14,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 3886 transitions, 64550 flow [2022-11-16 12:53:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-16 12:53:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-16 12:53:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8334 transitions. [2022-11-16 12:53:14,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8678537956888472 [2022-11-16 12:53:14,749 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8334 transitions. [2022-11-16 12:53:14,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8334 transitions. [2022-11-16 12:53:14,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:14,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8334 transitions. [2022-11-16 12:53:14,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 85.91752577319588) internal successors, (8334), 97 states have internal predecessors, (8334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,804 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 99.0) internal successors, (9702), 98 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,805 INFO L175 Difference]: Start difference. First operand has 285 places, 1112 transitions, 18163 flow. Second operand 97 states and 8334 transitions. [2022-11-16 12:53:14,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 3886 transitions, 64550 flow [2022-11-16 12:53:17,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 3886 transitions, 54779 flow, removed 4687 selfloop flow, removed 11 redundant places. [2022-11-16 12:53:17,932 INFO L231 Difference]: Finished difference. Result has 464 places, 3698 transitions, 61608 flow [2022-11-16 12:53:17,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=16646, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=61608, PETRI_PLACES=464, PETRI_TRANSITIONS=3698} [2022-11-16 12:53:17,933 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 383 predicate places. [2022-11-16 12:53:17,934 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 3698 transitions, 61608 flow [2022-11-16 12:53:17,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 81.04123711340206) internal successors, (7861), 97 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:17,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:17,937 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:17,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:53:18,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:53:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash 122613144, now seen corresponding path program 6 times [2022-11-16 12:53:18,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362571416] [2022-11-16 12:53:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:27,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362571416] [2022-11-16 12:53:27,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362571416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:27,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71390641] [2022-11-16 12:53:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:53:27,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:27,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:27,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb05c06-e63d-4657-b1ef-d10cc5cd6bf1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:53:28,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-16 12:53:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 12:53:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:29,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71390641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:41,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:53:41,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-16 12:53:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880527811] [2022-11-16 12:53:41,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-16 12:53:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-16 12:53:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-16 12:53:41,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 99 [2022-11-16 12:53:41,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 3698 transitions, 61608 flow. Second operand has 193 states, 193 states have (on average 81.02072538860104) internal successors, (15637), 193 states have internal predecessors, (15637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:41,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:41,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 99 [2022-11-16 12:53:41,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand