./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/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_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/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_5e703e30-17e3-49c1-a270-a44cbe2c158c/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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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 11:11:55,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:11:55,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:11:55,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:11:55,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:11:55,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:11:55,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:11:55,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:11:55,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:11:55,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:11:55,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:11:55,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:11:55,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:11:55,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:11:55,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:11:55,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:11:55,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:11:55,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:11:55,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:11:55,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:11:55,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:11:55,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:11:55,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:11:55,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:11:55,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:11:55,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:11:55,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:11:55,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:11:55,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:11:55,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:11:55,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:11:55,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:11:55,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:11:55,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:11:55,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:11:55,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:11:55,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:11:55,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:11:55,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:11:55,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:11:55,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:11:55,297 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:11:55,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:11:55,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:11:55,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:11:55,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:11:55,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:11:55,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:11:55,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:11:55,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:11:55,327 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:11:55,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:11:55,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:11:55,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:11:55,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:11:55,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:11:55,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:11:55,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:11:55,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:11:55,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:11:55,330 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:11:55,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:11:55,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:11:55,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:11:55,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:11:55,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:11:55,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:11:55,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:11:55,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:11:55,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:11:55,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:11:55,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:11:55,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:11:55,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:11:55,333 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:11:55,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:11:55,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:11:55,334 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_5e703e30-17e3-49c1-a270-a44cbe2c158c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-16 11:11:55,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:11:55,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:11:55,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:11:55,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:11:55,687 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:11:55,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-16 11:11:55,775 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/data/d328267a9/e0ca953f180d4734b0e074468cfabe50/FLAG45527027f [2022-11-16 11:11:56,256 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:11:56,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-16 11:11:56,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/data/d328267a9/e0ca953f180d4734b0e074468cfabe50/FLAG45527027f [2022-11-16 11:11:56,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/data/d328267a9/e0ca953f180d4734b0e074468cfabe50 [2022-11-16 11:11:56,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:11:56,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:11:56,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:11:56,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:11:56,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:11:56,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acdd2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56, skipping insertion in model container [2022-11-16 11:11:56,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:11:56,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:11:56,915 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_5e703e30-17e3-49c1-a270-a44cbe2c158c/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-16 11:11:56,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:11:56,927 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:11:56,949 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_5e703e30-17e3-49c1-a270-a44cbe2c158c/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-16 11:11:56,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:11:56,967 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:11:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56 WrapperNode [2022-11-16 11:11:56,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:11:56,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:11:56,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:11:56,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:11:56,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,050 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-16 11:11:57,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:11:57,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:11:57,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:11:57,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:11:57,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:11:57,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:11:57,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:11:57,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:11:57,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:57,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:11:57,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:57,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:11:57,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:11:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:11:57,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:11:57,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:11:57,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:11:57,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:11:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:11:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:11:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:11:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:11:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:11:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:11:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:11:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:11:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:11:57,246 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 11:11:57,416 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:11:57,420 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:11:57,662 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:11:57,904 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:11:57,904 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:11:57,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:11:57 BoogieIcfgContainer [2022-11-16 11:11:57,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:11:57,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:11:57,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:11:57,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:11:57,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:11:56" (1/3) ... [2022-11-16 11:11:57,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6c6cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:11:57, skipping insertion in model container [2022-11-16 11:11:57,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56" (2/3) ... [2022-11-16 11:11:57,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6c6cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:11:57, skipping insertion in model container [2022-11-16 11:11:57,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:11:57" (3/3) ... [2022-11-16 11:11:57,943 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-16 11:11:57,953 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:11:57,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:11:57,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 11:11:57,968 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:11:58,080 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:11:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 198 flow [2022-11-16 11:11:58,198 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2022-11-16 11:11:58,198 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:11:58,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 87 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2022-11-16 11:11:58,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 198 flow [2022-11-16 11:11:58,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 70 transitions, 149 flow [2022-11-16 11:11:58,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:11:58,242 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;@342dd3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:11:58,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-16 11:11:58,279 INFO L130 PetriNetUnfolder]: 2/38 cut-off events. [2022-11-16 11:11:58,282 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:11:58,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:11:58,284 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] [2022-11-16 11:11:58,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:11:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash -770060062, now seen corresponding path program 1 times [2022-11-16 11:11:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:58,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099742393] [2022-11-16 11:11:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:58,889 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 11:11:58,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:58,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099742393] [2022-11-16 11:11:58,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099742393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:58,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:58,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:11:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395550448] [2022-11-16 11:11:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:58,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:58,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:58,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:11:58,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:58,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:11:58,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:11:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:11:59,177 INFO L130 PetriNetUnfolder]: 39/159 cut-off events. [2022-11-16 11:11:59,178 INFO L131 PetriNetUnfolder]: For 24/25 co-relation queries the response was YES. [2022-11-16 11:11:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 159 events. 39/159 cut-off events. For 24/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 474 event pairs, 12 based on Foata normal form. 17/118 useless extension candidates. Maximal degree in co-relation 168. Up to 61 conditions per place. [2022-11-16 11:11:59,185 INFO L137 encePairwiseOnDemand]: 80/91 looper letters, 12 selfloop transitions, 2 changer transitions 2/70 dead transitions. [2022-11-16 11:11:59,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 185 flow [2022-11-16 11:11:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:11:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-11-16 11:11:59,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8901098901098901 [2022-11-16 11:11:59,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-11-16 11:11:59,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-11-16 11:11:59,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:11:59,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-11-16 11:11:59,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:11:59,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:59,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:59,243 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 149 flow. Second operand 3 states and 243 transitions. [2022-11-16 11:11:59,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 185 flow [2022-11-16 11:11:59,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 177 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:11:59,263 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 154 flow [2022-11-16 11:11:59,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2022-11-16 11:11:59,274 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2022-11-16 11:11:59,275 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 154 flow [2022-11-16 11:11:59,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:59,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:11:59,276 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] [2022-11-16 11:11:59,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:11:59,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:11:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:59,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1293334427, now seen corresponding path program 1 times [2022-11-16 11:11:59,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:59,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904928583] [2022-11-16 11:11:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:59,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,420 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 11:11:59,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904928583] [2022-11-16 11:11:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904928583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:59,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:59,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484448953] [2022-11-16 11:11:59,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:59,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:11:59,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:11:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:11:59,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 91 [2022-11-16 11:11:59,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 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 11:11:59,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:11:59,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 91 [2022-11-16 11:11:59,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:11:59,615 INFO L130 PetriNetUnfolder]: 173/393 cut-off events. [2022-11-16 11:11:59,615 INFO L131 PetriNetUnfolder]: For 40/48 co-relation queries the response was YES. [2022-11-16 11:11:59,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 393 events. 173/393 cut-off events. For 40/48 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1879 event pairs, 17 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 677. Up to 203 conditions per place. [2022-11-16 11:11:59,620 INFO L137 encePairwiseOnDemand]: 85/91 looper letters, 38 selfloop transitions, 4 changer transitions 2/89 dead transitions. [2022-11-16 11:11:59,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 313 flow [2022-11-16 11:11:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:11:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:11:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2022-11-16 11:11:59,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043956043956044 [2022-11-16 11:11:59,624 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2022-11-16 11:11:59,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2022-11-16 11:11:59,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:11:59,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2022-11-16 11:11:59,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 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 11:11:59,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 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 11:11:59,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 91.0) internal successors, (546), 6 states have internal predecessors, (546), 0 states have call successors, (0), 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 11:11:59,628 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 154 flow. Second operand 5 states and 366 transitions. [2022-11-16 11:11:59,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 313 flow [2022-11-16 11:11:59,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:11:59,632 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 182 flow [2022-11-16 11:11:59,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-11-16 11:11:59,633 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-11-16 11:11:59,633 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 182 flow [2022-11-16 11:11:59,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 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 11:11:59,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:11:59,646 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] [2022-11-16 11:11:59,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:11:59,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:11:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1354154245, now seen corresponding path program 1 times [2022-11-16 11:11:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40923813] [2022-11-16 11:11:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:59,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,840 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 11:11:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:59,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40923813] [2022-11-16 11:11:59,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40923813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328372203] [2022-11-16 11:11:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:59,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:59,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:59,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:11:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:11:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:00,094 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 11:12:00,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:00,180 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 11:12:00,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328372203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:00,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:00,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 11:12:00,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99061034] [2022-11-16 11:12:00,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:00,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:12:00,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:00,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:12:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:12:00,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:12:00,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 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 11:12:00,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:00,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:12:00,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:00,388 INFO L130 PetriNetUnfolder]: 95/446 cut-off events. [2022-11-16 11:12:00,388 INFO L131 PetriNetUnfolder]: For 69/87 co-relation queries the response was YES. [2022-11-16 11:12:00,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 446 events. 95/446 cut-off events. For 69/87 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2297 event pairs, 5 based on Foata normal form. 5/360 useless extension candidates. Maximal degree in co-relation 721. Up to 101 conditions per place. [2022-11-16 11:12:00,395 INFO L137 encePairwiseOnDemand]: 83/91 looper letters, 24 selfloop transitions, 17 changer transitions 1/99 dead transitions. [2022-11-16 11:12:00,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 371 flow [2022-11-16 11:12:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:12:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:12:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 557 transitions. [2022-11-16 11:12:00,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8744113029827315 [2022-11-16 11:12:00,398 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 557 transitions. [2022-11-16 11:12:00,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 557 transitions. [2022-11-16 11:12:00,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:00,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 557 transitions. [2022-11-16 11:12:00,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.57142857142857) internal successors, (557), 7 states have internal predecessors, (557), 0 states have call successors, (0), 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 11:12:00,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 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 11:12:00,404 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 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 11:12:00,404 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 182 flow. Second operand 7 states and 557 transitions. [2022-11-16 11:12:00,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 371 flow [2022-11-16 11:12:00,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:12:00,409 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 339 flow [2022-11-16 11:12:00,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-11-16 11:12:00,410 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2022-11-16 11:12:00,410 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 339 flow [2022-11-16 11:12:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 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 11:12:00,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:00,411 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] [2022-11-16 11:12:00,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:00,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:00,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1354154246, now seen corresponding path program 1 times [2022-11-16 11:12:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:00,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045030075] [2022-11-16 11:12:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:00,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:00,729 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 11:12:00,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045030075] [2022-11-16 11:12:00,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045030075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682049519] [2022-11-16 11:12:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:00,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:00,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:00,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:00,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:12:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:12:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:00,887 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 11:12:00,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:00,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682049519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:00,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:00,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-16 11:12:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278657846] [2022-11-16 11:12:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:12:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:12:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:12:00,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:12:00,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 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 11:12:00,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:00,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:12:00,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:01,043 INFO L130 PetriNetUnfolder]: 93/503 cut-off events. [2022-11-16 11:12:01,043 INFO L131 PetriNetUnfolder]: For 931/1214 co-relation queries the response was YES. [2022-11-16 11:12:01,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 503 events. 93/503 cut-off events. For 931/1214 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2776 event pairs, 2 based on Foata normal form. 39/472 useless extension candidates. Maximal degree in co-relation 1049. Up to 100 conditions per place. [2022-11-16 11:12:01,049 INFO L137 encePairwiseOnDemand]: 83/91 looper letters, 14 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2022-11-16 11:12:01,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 437 flow [2022-11-16 11:12:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:12:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:12:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 308 transitions. [2022-11-16 11:12:01,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2022-11-16 11:12:01,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 308 transitions. [2022-11-16 11:12:01,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 308 transitions. [2022-11-16 11:12:01,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:01,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 308 transitions. [2022-11-16 11:12:01,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,055 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,056 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 339 flow. Second operand 4 states and 308 transitions. [2022-11-16 11:12:01,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 437 flow [2022-11-16 11:12:01,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 423 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-16 11:12:01,063 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 435 flow [2022-11-16 11:12:01,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2022-11-16 11:12:01,064 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2022-11-16 11:12:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 435 flow [2022-11-16 11:12:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 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 11:12:01,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:01,065 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] [2022-11-16 11:12:01,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:01,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 175227428, now seen corresponding path program 1 times [2022-11-16 11:12:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188478448] [2022-11-16 11:12:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:01,319 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 11:12:01,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188478448] [2022-11-16 11:12:01,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188478448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:01,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:01,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:12:01,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292615524] [2022-11-16 11:12:01,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:01,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:01,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:01,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:12:01,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 91 [2022-11-16 11:12:01,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:01,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 91 [2022-11-16 11:12:01,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:01,464 INFO L130 PetriNetUnfolder]: 143/660 cut-off events. [2022-11-16 11:12:01,464 INFO L131 PetriNetUnfolder]: For 2066/2523 co-relation queries the response was YES. [2022-11-16 11:12:01,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 660 events. 143/660 cut-off events. For 2066/2523 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4208 event pairs, 44 based on Foata normal form. 17/535 useless extension candidates. Maximal degree in co-relation 1580. Up to 221 conditions per place. [2022-11-16 11:12:01,471 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 40 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2022-11-16 11:12:01,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 641 flow [2022-11-16 11:12:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:12:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2022-11-16 11:12:01,473 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2022-11-16 11:12:01,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2022-11-16 11:12:01,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2022-11-16 11:12:01,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:01,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2022-11-16 11:12:01,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 11:12:01,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,477 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 435 flow. Second operand 3 states and 234 transitions. [2022-11-16 11:12:01,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 641 flow [2022-11-16 11:12:01,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 580 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-16 11:12:01,484 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 461 flow [2022-11-16 11:12:01,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=461, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2022-11-16 11:12:01,485 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2022-11-16 11:12:01,485 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 461 flow [2022-11-16 11:12:01,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:01,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:01,486 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] [2022-11-16 11:12:01,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:12:01,487 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -32851000, now seen corresponding path program 1 times [2022-11-16 11:12:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313196822] [2022-11-16 11:12:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:01,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:01,603 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 11:12:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:01,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313196822] [2022-11-16 11:12:01,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313196822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:01,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748187135] [2022-11-16 11:12:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:01,607 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:01,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:12:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:12:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:01,732 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 11:12:01,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:01,811 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 11:12:01,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748187135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:01,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:01,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:12:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569534757] [2022-11-16 11:12:01,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:01,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:12:01,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:12:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:12:01,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 91 [2022-11-16 11:12:01,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 461 flow. Second operand has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 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 11:12:01,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:01,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 91 [2022-11-16 11:12:01,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:02,609 INFO L130 PetriNetUnfolder]: 730/1877 cut-off events. [2022-11-16 11:12:02,609 INFO L131 PetriNetUnfolder]: For 5158/5214 co-relation queries the response was YES. [2022-11-16 11:12:02,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6984 conditions, 1877 events. 730/1877 cut-off events. For 5158/5214 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12659 event pairs, 34 based on Foata normal form. 110/1637 useless extension candidates. Maximal degree in co-relation 6603. Up to 633 conditions per place. [2022-11-16 11:12:02,633 INFO L137 encePairwiseOnDemand]: 84/91 looper letters, 270 selfloop transitions, 18 changer transitions 2/335 dead transitions. [2022-11-16 11:12:02,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 335 transitions, 3332 flow [2022-11-16 11:12:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:12:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:12:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1281 transitions. [2022-11-16 11:12:02,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2022-11-16 11:12:02,640 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1281 transitions. [2022-11-16 11:12:02,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1281 transitions. [2022-11-16 11:12:02,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:02,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1281 transitions. [2022-11-16 11:12:02,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.16666666666667) internal successors, (1281), 18 states have internal predecessors, (1281), 0 states have call successors, (0), 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 11:12:02,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 91.0) internal successors, (1729), 19 states have internal predecessors, (1729), 0 states have call successors, (0), 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 11:12:02,649 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 91.0) internal successors, (1729), 19 states have internal predecessors, (1729), 0 states have call successors, (0), 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 11:12:02,649 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 461 flow. Second operand 18 states and 1281 transitions. [2022-11-16 11:12:02,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 335 transitions, 3332 flow [2022-11-16 11:12:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 335 transitions, 3309 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:12:02,673 INFO L231 Difference]: Finished difference. Result has 112 places, 102 transitions, 562 flow [2022-11-16 11:12:02,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=562, PETRI_PLACES=112, PETRI_TRANSITIONS=102} [2022-11-16 11:12:02,677 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 40 predicate places. [2022-11-16 11:12:02,677 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 102 transitions, 562 flow [2022-11-16 11:12:02,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 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 11:12:02,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:02,678 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] [2022-11-16 11:12:02,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:02,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1018380706, now seen corresponding path program 1 times [2022-11-16 11:12:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724775154] [2022-11-16 11:12:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:03,008 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 11:12:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724775154] [2022-11-16 11:12:03,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724775154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954063497] [2022-11-16 11:12:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:03,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:03,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:12:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:03,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:12:03,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:03,129 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 11:12:03,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:03,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954063497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:03,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:03,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:12:03,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999922943] [2022-11-16 11:12:03,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:03,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:12:03,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:03,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:12:03,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:03,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 91 [2022-11-16 11:12:03,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 102 transitions, 562 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 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 11:12:03,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:03,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 91 [2022-11-16 11:12:03,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:03,641 INFO L130 PetriNetUnfolder]: 655/1695 cut-off events. [2022-11-16 11:12:03,642 INFO L131 PetriNetUnfolder]: For 5194/5269 co-relation queries the response was YES. [2022-11-16 11:12:03,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 1695 events. 655/1695 cut-off events. For 5194/5269 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11151 event pairs, 102 based on Foata normal form. 134/1499 useless extension candidates. Maximal degree in co-relation 6277. Up to 641 conditions per place. [2022-11-16 11:12:03,660 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 83 selfloop transitions, 11 changer transitions 2/141 dead transitions. [2022-11-16 11:12:03,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 141 transitions, 1110 flow [2022-11-16 11:12:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:12:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:12:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 495 transitions. [2022-11-16 11:12:03,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7770800627943485 [2022-11-16 11:12:03,662 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 495 transitions. [2022-11-16 11:12:03,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 495 transitions. [2022-11-16 11:12:03,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:03,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 495 transitions. [2022-11-16 11:12:03,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.71428571428571) internal successors, (495), 7 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 11:12:03,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 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 11:12:03,668 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 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 11:12:03,668 INFO L175 Difference]: Start difference. First operand has 112 places, 102 transitions, 562 flow. Second operand 7 states and 495 transitions. [2022-11-16 11:12:03,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 141 transitions, 1110 flow [2022-11-16 11:12:03,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 1078 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 11:12:03,689 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 525 flow [2022-11-16 11:12:03,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2022-11-16 11:12:03,690 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 36 predicate places. [2022-11-16 11:12:03,690 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 525 flow [2022-11-16 11:12:03,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 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 11:12:03,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:03,691 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 11:12:03,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:12:03,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:03,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:03,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1635204553, now seen corresponding path program 1 times [2022-11-16 11:12:03,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:03,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739721585] [2022-11-16 11:12:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:04,043 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 11:12:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739721585] [2022-11-16 11:12:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739721585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:04,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865004739] [2022-11-16 11:12:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:04,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:04,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:04,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:04,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:12:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:12:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:04,251 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 11:12:04,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:04,381 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 11:12:04,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865004739] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:04,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:12:04,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-16 11:12:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705718985] [2022-11-16 11:12:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:12:04,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:12:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:12:04,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 91 [2022-11-16 11:12:04,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 525 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 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 11:12:04,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:04,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 91 [2022-11-16 11:12:04,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:04,607 INFO L130 PetriNetUnfolder]: 220/994 cut-off events. [2022-11-16 11:12:04,607 INFO L131 PetriNetUnfolder]: For 2306/2883 co-relation queries the response was YES. [2022-11-16 11:12:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 994 events. 220/994 cut-off events. For 2306/2883 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7340 event pairs, 105 based on Foata normal form. 26/797 useless extension candidates. Maximal degree in co-relation 2428. Up to 431 conditions per place. [2022-11-16 11:12:04,617 INFO L137 encePairwiseOnDemand]: 87/91 looper letters, 37 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2022-11-16 11:12:04,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 103 transitions, 621 flow [2022-11-16 11:12:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:12:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:12:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2022-11-16 11:12:04,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8076923076923077 [2022-11-16 11:12:04,620 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 294 transitions. [2022-11-16 11:12:04,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 294 transitions. [2022-11-16 11:12:04,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:04,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 294 transitions. [2022-11-16 11:12:04,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 11:12:04,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:04,625 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:04,625 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 525 flow. Second operand 4 states and 294 transitions. [2022-11-16 11:12:04,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 103 transitions, 621 flow [2022-11-16 11:12:04,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 103 transitions, 607 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:12:04,635 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 503 flow [2022-11-16 11:12:04,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=503, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-11-16 11:12:04,638 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 35 predicate places. [2022-11-16 11:12:04,638 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 503 flow [2022-11-16 11:12:04,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 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 11:12:04,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:04,639 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 11:12:04,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:04,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:04,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash -120120572, now seen corresponding path program 1 times [2022-11-16 11:12:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:04,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297728033] [2022-11-16 11:12:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:04,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:04,960 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 11:12:04,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297728033] [2022-11-16 11:12:04,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297728033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586780836] [2022-11-16 11:12:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:04,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:04,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:12:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:12:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:05,126 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 11:12:05,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:05,200 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 11:12:05,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586780836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:05,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:05,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:12:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848929037] [2022-11-16 11:12:05,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:05,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:12:05,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:05,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:12:05,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:05,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 91 [2022-11-16 11:12:05,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 65.0) internal successors, (520), 8 states have internal predecessors, (520), 0 states have call successors, (0), 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 11:12:05,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:05,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 91 [2022-11-16 11:12:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:05,619 INFO L130 PetriNetUnfolder]: 478/1732 cut-off events. [2022-11-16 11:12:05,619 INFO L131 PetriNetUnfolder]: For 2455/2455 co-relation queries the response was YES. [2022-11-16 11:12:05,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1732 events. 478/1732 cut-off events. For 2455/2455 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 13518 event pairs, 133 based on Foata normal form. 36/1468 useless extension candidates. Maximal degree in co-relation 4023. Up to 348 conditions per place. [2022-11-16 11:12:05,633 INFO L137 encePairwiseOnDemand]: 82/91 looper letters, 54 selfloop transitions, 20 changer transitions 4/132 dead transitions. [2022-11-16 11:12:05,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 132 transitions, 840 flow [2022-11-16 11:12:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:12:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:12:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 599 transitions. [2022-11-16 11:12:05,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7313797313797313 [2022-11-16 11:12:05,636 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 599 transitions. [2022-11-16 11:12:05,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 599 transitions. [2022-11-16 11:12:05,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:05,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 599 transitions. [2022-11-16 11:12:05,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.55555555555556) internal successors, (599), 9 states have internal predecessors, (599), 0 states have call successors, (0), 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 11:12:05,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:05,641 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:05,641 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 503 flow. Second operand 9 states and 599 transitions. [2022-11-16 11:12:05,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 132 transitions, 840 flow [2022-11-16 11:12:05,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 132 transitions, 826 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-16 11:12:05,655 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 563 flow [2022-11-16 11:12:05,656 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=563, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2022-11-16 11:12:05,656 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 42 predicate places. [2022-11-16 11:12:05,657 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 563 flow [2022-11-16 11:12:05,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 65.0) internal successors, (520), 8 states have internal predecessors, (520), 0 states have call successors, (0), 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 11:12:05,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:05,658 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] [2022-11-16 11:12:05,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:05,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:12:05,864 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:05,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:05,865 INFO L85 PathProgramCache]: Analyzing trace with hash 818871842, now seen corresponding path program 2 times [2022-11-16 11:12:05,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:05,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049526788] [2022-11-16 11:12:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:05,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:05,986 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 11:12:05,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049526788] [2022-11-16 11:12:05,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049526788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968594245] [2022-11-16 11:12:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:12:05,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:05,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:05,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:12:06,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:12:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:12:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:06,217 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 11:12:06,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:06,399 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 11:12:06,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968594245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:06,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:06,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 11:12:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529882222] [2022-11-16 11:12:06,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:12:06,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:12:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:12:06,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:12:06,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 563 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 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 11:12:06,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:06,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:12:06,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:06,856 INFO L130 PetriNetUnfolder]: 183/1380 cut-off events. [2022-11-16 11:12:06,857 INFO L131 PetriNetUnfolder]: For 5953/6320 co-relation queries the response was YES. [2022-11-16 11:12:06,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3676 conditions, 1380 events. 183/1380 cut-off events. For 5953/6320 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9816 event pairs, 11 based on Foata normal form. 249/1551 useless extension candidates. Maximal degree in co-relation 3306. Up to 151 conditions per place. [2022-11-16 11:12:06,872 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 42 selfloop transitions, 63 changer transitions 1/174 dead transitions. [2022-11-16 11:12:06,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 174 transitions, 1498 flow [2022-11-16 11:12:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:12:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:12:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1007 transitions. [2022-11-16 11:12:06,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8512256973795436 [2022-11-16 11:12:06,877 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1007 transitions. [2022-11-16 11:12:06,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1007 transitions. [2022-11-16 11:12:06,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:06,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1007 transitions. [2022-11-16 11:12:06,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 77.46153846153847) internal successors, (1007), 13 states have internal predecessors, (1007), 0 states have call successors, (0), 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 11:12:06,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:06,885 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:06,886 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 563 flow. Second operand 13 states and 1007 transitions. [2022-11-16 11:12:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 174 transitions, 1498 flow [2022-11-16 11:12:06,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 174 transitions, 1444 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-11-16 11:12:06,904 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1488 flow [2022-11-16 11:12:06,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1488, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2022-11-16 11:12:06,907 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 60 predicate places. [2022-11-16 11:12:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1488 flow [2022-11-16 11:12:06,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 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 11:12:06,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:06,908 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] [2022-11-16 11:12:06,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:12:07,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:12:07,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash 956835237, now seen corresponding path program 2 times [2022-11-16 11:12:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174265927] [2022-11-16 11:12:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:07,382 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 11:12:07,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174265927] [2022-11-16 11:12:07,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174265927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825566520] [2022-11-16 11:12:07,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:12:07,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:07,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:07,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:07,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:12:07,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:12:07,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:12:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:07,629 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 11:12:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:07,796 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 11:12:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825566520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:07,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:07,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-16 11:12:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922721171] [2022-11-16 11:12:07,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:12:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:12:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:12:07,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 91 [2022-11-16 11:12:07,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1488 flow. Second operand has 16 states, 16 states have (on average 59.5625) internal successors, (953), 16 states have internal predecessors, (953), 0 states have call successors, (0), 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 11:12:07,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:07,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 91 [2022-11-16 11:12:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:10,563 INFO L130 PetriNetUnfolder]: 2962/7422 cut-off events. [2022-11-16 11:12:10,564 INFO L131 PetriNetUnfolder]: For 33431/33519 co-relation queries the response was YES. [2022-11-16 11:12:10,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24852 conditions, 7422 events. 2962/7422 cut-off events. For 33431/33519 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 58196 event pairs, 199 based on Foata normal form. 297/7377 useless extension candidates. Maximal degree in co-relation 24028. Up to 1091 conditions per place. [2022-11-16 11:12:10,657 INFO L137 encePairwiseOnDemand]: 82/91 looper letters, 452 selfloop transitions, 23 changer transitions 12/526 dead transitions. [2022-11-16 11:12:10,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 526 transitions, 7128 flow [2022-11-16 11:12:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:12:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 11:12:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1380 transitions. [2022-11-16 11:12:10,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6893106893106893 [2022-11-16 11:12:10,663 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1380 transitions. [2022-11-16 11:12:10,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1380 transitions. [2022-11-16 11:12:10,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:10,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1380 transitions. [2022-11-16 11:12:10,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.72727272727273) internal successors, (1380), 22 states have internal predecessors, (1380), 0 states have call successors, (0), 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 11:12:10,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 91.0) internal successors, (2093), 23 states have internal predecessors, (2093), 0 states have call successors, (0), 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 11:12:10,675 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 91.0) internal successors, (2093), 23 states have internal predecessors, (2093), 0 states have call successors, (0), 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 11:12:10,675 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1488 flow. Second operand 22 states and 1380 transitions. [2022-11-16 11:12:10,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 526 transitions, 7128 flow [2022-11-16 11:12:10,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 526 transitions, 6622 flow, removed 233 selfloop flow, removed 6 redundant places. [2022-11-16 11:12:10,746 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 1410 flow [2022-11-16 11:12:10,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1410, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2022-11-16 11:12:10,749 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 75 predicate places. [2022-11-16 11:12:10,749 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 1410 flow [2022-11-16 11:12:10,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 59.5625) internal successors, (953), 16 states have internal predecessors, (953), 0 states have call successors, (0), 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 11:12:10,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:10,750 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] [2022-11-16 11:12:10,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:10,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:10,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:10,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1137013246, now seen corresponding path program 3 times [2022-11-16 11:12:10,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:10,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735204861] [2022-11-16 11:12:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:11,312 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 11:12:11,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735204861] [2022-11-16 11:12:11,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735204861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:11,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888958702] [2022-11-16 11:12:11,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:12:11,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:11,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:11,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:11,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:12:11,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 11:12:11,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:11,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:12:11,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:11,648 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 11:12:11,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:12,171 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 11:12:12,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888958702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:12,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:12,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 11:12:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707211643] [2022-11-16 11:12:12,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:12,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:12:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:12:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:12:12,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:12:12,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 1410 flow. Second operand has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 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 11:12:12,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:12,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:12:12,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:13,507 INFO L130 PetriNetUnfolder]: 476/3488 cut-off events. [2022-11-16 11:12:13,508 INFO L131 PetriNetUnfolder]: For 36960/38131 co-relation queries the response was YES. [2022-11-16 11:12:13,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10215 conditions, 3488 events. 476/3488 cut-off events. For 36960/38131 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 27359 event pairs, 12 based on Foata normal form. 836/4308 useless extension candidates. Maximal degree in co-relation 9461. Up to 429 conditions per place. [2022-11-16 11:12:13,552 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 68 selfloop transitions, 247 changer transitions 1/388 dead transitions. [2022-11-16 11:12:13,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 388 transitions, 4368 flow [2022-11-16 11:12:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:12:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-16 11:12:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1943 transitions. [2022-11-16 11:12:13,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8540659340659341 [2022-11-16 11:12:13,563 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1943 transitions. [2022-11-16 11:12:13,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1943 transitions. [2022-11-16 11:12:13,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:13,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1943 transitions. [2022-11-16 11:12:13,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 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 11:12:13,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 91.0) internal successors, (2366), 26 states have internal predecessors, (2366), 0 states have call successors, (0), 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 11:12:13,582 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 91.0) internal successors, (2366), 26 states have internal predecessors, (2366), 0 states have call successors, (0), 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 11:12:13,582 INFO L175 Difference]: Start difference. First operand has 147 places, 157 transitions, 1410 flow. Second operand 25 states and 1943 transitions. [2022-11-16 11:12:13,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 388 transitions, 4368 flow [2022-11-16 11:12:13,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 388 transitions, 4316 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-11-16 11:12:13,638 INFO L231 Difference]: Finished difference. Result has 178 places, 343 transitions, 4678 flow [2022-11-16 11:12:13,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4678, PETRI_PLACES=178, PETRI_TRANSITIONS=343} [2022-11-16 11:12:13,639 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 106 predicate places. [2022-11-16 11:12:13,639 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 343 transitions, 4678 flow [2022-11-16 11:12:13,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 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 11:12:13,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:13,641 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] [2022-11-16 11:12:13,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:13,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:13,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:13,850 INFO L85 PathProgramCache]: Analyzing trace with hash -939907646, now seen corresponding path program 4 times [2022-11-16 11:12:13,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:13,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761401878] [2022-11-16 11:12:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:15,092 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 11:12:15,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:15,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761401878] [2022-11-16 11:12:15,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761401878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:15,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666344130] [2022-11-16 11:12:15,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:12:15,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:15,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:15,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:12:15,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:12:15,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:12:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:15,575 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 11:12:15,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:16,782 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 11:12:16,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666344130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:16,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:16,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-16 11:12:16,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974179554] [2022-11-16 11:12:16,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 11:12:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 11:12:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:12:16,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:12:16,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 343 transitions, 4678 flow. Second operand has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 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 11:12:16,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:16,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:12:16,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:20,985 INFO L130 PetriNetUnfolder]: 1238/8984 cut-off events. [2022-11-16 11:12:20,986 INFO L131 PetriNetUnfolder]: For 394911/398889 co-relation queries the response was YES. [2022-11-16 11:12:21,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28119 conditions, 8984 events. 1238/8984 cut-off events. For 394911/398889 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 76478 event pairs, 12 based on Foata normal form. 2762/11730 useless extension candidates. Maximal degree in co-relation 26711. Up to 1421 conditions per place. [2022-11-16 11:12:21,105 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 118 selfloop transitions, 911 changer transitions 1/1102 dead transitions. [2022-11-16 11:12:21,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1102 transitions, 16640 flow [2022-11-16 11:12:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:12:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:12:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3815 transitions. [2022-11-16 11:12:21,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8555729984301413 [2022-11-16 11:12:21,125 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3815 transitions. [2022-11-16 11:12:21,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3815 transitions. [2022-11-16 11:12:21,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:21,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3815 transitions. [2022-11-16 11:12:21,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 77.85714285714286) internal successors, (3815), 49 states have internal predecessors, (3815), 0 states have call successors, (0), 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 11:12:21,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 91.0) internal successors, (4550), 50 states have internal predecessors, (4550), 0 states have call successors, (0), 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 11:12:21,156 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 91.0) internal successors, (4550), 50 states have internal predecessors, (4550), 0 states have call successors, (0), 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 11:12:21,156 INFO L175 Difference]: Start difference. First operand has 178 places, 343 transitions, 4678 flow. Second operand 49 states and 3815 transitions. [2022-11-16 11:12:21,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1102 transitions, 16640 flow [2022-11-16 11:12:21,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1102 transitions, 14161 flow, removed 1205 selfloop flow, removed 5 redundant places. [2022-11-16 11:12:21,451 INFO L231 Difference]: Finished difference. Result has 267 places, 1009 transitions, 15751 flow [2022-11-16 11:12:21,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=4213, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=15751, PETRI_PLACES=267, PETRI_TRANSITIONS=1009} [2022-11-16 11:12:21,453 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 195 predicate places. [2022-11-16 11:12:21,453 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1009 transitions, 15751 flow [2022-11-16 11:12:21,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 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 11:12:21,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:21,474 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] [2022-11-16 11:12:21,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:21,681 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash -383568574, now seen corresponding path program 5 times [2022-11-16 11:12:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623100488] [2022-11-16 11:12:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,452 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 11:12:25,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623100488] [2022-11-16 11:12:25,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623100488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116463213] [2022-11-16 11:12:25,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:12:25,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:25,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:25,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:12:25,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-16 11:12:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:12:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:26,351 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 11:12:26,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:30,422 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 11:12:30,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116463213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:30,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:30,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-16 11:12:30,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382539502] [2022-11-16 11:12:30,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-16 11:12:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-16 11:12:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 11:12:30,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:12:30,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1009 transitions, 15751 flow. Second operand has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 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 11:12:30,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:12:30,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:12:30,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:12:49,874 INFO L130 PetriNetUnfolder]: 3920/27259 cut-off events. [2022-11-16 11:12:49,874 INFO L131 PetriNetUnfolder]: For 4067923/4084871 co-relation queries the response was YES. [2022-11-16 11:12:50,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87846 conditions, 27259 events. 3920/27259 cut-off events. For 4067923/4084871 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 265740 event pairs, 11 based on Foata normal form. 10261/37505 useless extension candidates. Maximal degree in co-relation 80071. Up to 4569 conditions per place. [2022-11-16 11:12:50,281 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 216 selfloop transitions, 3399 changer transitions 1/3688 dead transitions. [2022-11-16 11:12:50,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 3688 transitions, 59561 flow [2022-11-16 11:12:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-16 11:12:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-16 11:12:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 7559 transitions. [2022-11-16 11:12:50,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.856349835731279 [2022-11-16 11:12:50,295 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 7559 transitions. [2022-11-16 11:12:50,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 7559 transitions. [2022-11-16 11:12:50,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:12:50,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 7559 transitions. [2022-11-16 11:12:50,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 77.9278350515464) internal successors, (7559), 97 states have internal predecessors, (7559), 0 states have call successors, (0), 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 11:12:50,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 91.0) internal successors, (8918), 98 states have internal predecessors, (8918), 0 states have call successors, (0), 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 11:12:50,332 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 91.0) internal successors, (8918), 98 states have internal predecessors, (8918), 0 states have call successors, (0), 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 11:12:50,332 INFO L175 Difference]: Start difference. First operand has 267 places, 1009 transitions, 15751 flow. Second operand 97 states and 7559 transitions. [2022-11-16 11:12:50,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 3688 transitions, 59561 flow [2022-11-16 11:12:52,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 3688 transitions, 50306 flow, removed 4445 selfloop flow, removed 11 redundant places. [2022-11-16 11:12:52,735 INFO L231 Difference]: Finished difference. Result has 446 places, 3499 transitions, 56676 flow [2022-11-16 11:12:52,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=14558, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=921, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=56676, PETRI_PLACES=446, PETRI_TRANSITIONS=3499} [2022-11-16 11:12:52,737 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 374 predicate places. [2022-11-16 11:12:52,737 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 3499 transitions, 56676 flow [2022-11-16 11:12:52,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 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 11:12:52,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:12:52,741 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] [2022-11-16 11:12:52,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:52,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:12:52,947 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-16 11:12:52,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash 375182402, now seen corresponding path program 6 times [2022-11-16 11:12:52,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:52,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101290604] [2022-11-16 11:12:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:52,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:04,252 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 11:13:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:04,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101290604] [2022-11-16 11:13:04,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101290604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35248174] [2022-11-16 11:13:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:13:04,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:04,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:04,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e703e30-17e3-49c1-a270-a44cbe2c158c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:13:04,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-16 11:13:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 11:13:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:06,322 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 11:13:06,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:20,101 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 11:13:20,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35248174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:20,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:20,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-16 11:13:20,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075327788] [2022-11-16 11:13:20,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-16 11:13:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-16 11:13:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-16 11:13:20,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-11-16 11:13:20,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 3499 transitions, 56676 flow. Second operand has 193 states, 193 states have (on average 73.02072538860104) internal successors, (14093), 193 states have internal predecessors, (14093), 0 states have call successors, (0), 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 11:13:20,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:20,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-11-16 11:13:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand