./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN --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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- 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-6b4ec56 [2022-11-20 12:05:37,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:05:37,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:05:37,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:05:37,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:05:37,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:05:37,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:05:37,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:05:37,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:05:37,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:05:37,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:05:37,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:05:37,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:05:37,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:05:37,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:05:37,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:05:37,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:05:37,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:05:37,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:05:37,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:05:37,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:05:37,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:05:37,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:05:37,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:05:37,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:05:37,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:05:37,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:05:37,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:05:37,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:05:37,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:05:37,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:05:37,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:05:37,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:05:37,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:05:37,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:05:37,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:05:37,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:05:37,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:05:37,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:05:37,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:05:37,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:05:37,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 12:05:37,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:05:37,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:05:37,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:05:37,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:05:37,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:05:37,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:05:37,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:05:37,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:05:37,369 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:05:37,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:05:37,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:05:37,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:05:37,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:05:37,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:05:37,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:05:37,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:05:37,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:05:37,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:05:37,371 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 12:05:37,371 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:05:37,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:05:37,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:05:37,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:05:37,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:05:37,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:05:37,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:05:37,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:05:37,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:05:37,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:05:37,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:05:37,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:05:37,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:05:37,374 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:05:37,374 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:05:37,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:05:37,374 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_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-20 12:05:37,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:05:37,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:05:37,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:05:37,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:05:37,746 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:05:37,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-20 12:05:40,678 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:05:40,968 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:05:40,969 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-20 12:05:40,976 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/data/3f795ee0f/11b3bb41871244adb012ad815ed615cb/FLAG14d11882d [2022-11-20 12:05:40,992 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/data/3f795ee0f/11b3bb41871244adb012ad815ed615cb [2022-11-20 12:05:40,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:05:40,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:05:40,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:05:40,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:05:41,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:05:41,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:05:40" (1/1) ... [2022-11-20 12:05:41,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137c4c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41, skipping insertion in model container [2022-11-20 12:05:41,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:05:40" (1/1) ... [2022-11-20 12:05:41,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:05:41,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:05:41,227 WARN L237 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_f09cd6a2-b0d1-4169-a4fb-d21f15647147/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-20 12:05:41,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:05:41,246 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:05:41,296 WARN L237 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_f09cd6a2-b0d1-4169-a4fb-d21f15647147/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-20 12:05:41,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:05:41,322 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:05:41,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41 WrapperNode [2022-11-20 12:05:41,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:05:41,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:05:41,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:05:41,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:05:41,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,393 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 171 [2022-11-20 12:05:41,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:05:41,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:05:41,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:05:41,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:05:41,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,441 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:05:41,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:05:41,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:05:41,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:05:41,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (1/1) ... [2022-11-20 12:05:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:05:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:41,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:05:41,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:05:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:05:41,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:05:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:05:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:05:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:05:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:05:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:05:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:05:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 12:05:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 12:05:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:05:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:05:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:05:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:05:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:05:41,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:05:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:05:41,540 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:05:41,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:05:41,660 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:05:42,011 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:05:42,145 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:05:42,145 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 12:05:42,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:05:42 BoogieIcfgContainer [2022-11-20 12:05:42,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:05:42,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:05:42,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:05:42,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:05:42,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:05:40" (1/3) ... [2022-11-20 12:05:42,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38996284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:05:42, skipping insertion in model container [2022-11-20 12:05:42,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:41" (2/3) ... [2022-11-20 12:05:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38996284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:05:42, skipping insertion in model container [2022-11-20 12:05:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:05:42" (3/3) ... [2022-11-20 12:05:42,156 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-20 12:05:42,165 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:05:42,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:05:42,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-20 12:05:42,176 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:05:42,296 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 12:05:42,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 153 transitions, 330 flow [2022-11-20 12:05:42,410 INFO L130 PetriNetUnfolder]: 10/150 cut-off events. [2022-11-20 12:05:42,410 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 12:05:42,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 10/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-20 12:05:42,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 153 transitions, 330 flow [2022-11-20 12:05:42,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 134 transitions, 280 flow [2022-11-20 12:05:42,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:05:42,464 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;@cdeb7a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:05:42,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-20 12:05:42,506 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-20 12:05:42,506 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:05:42,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:42,507 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:42,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1699002523, now seen corresponding path program 1 times [2022-11-20 12:05:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:42,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999740450] [2022-11-20 12:05:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:43,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999740450] [2022-11-20 12:05:43,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999740450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:43,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:43,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:05:43,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203328378] [2022-11-20 12:05:43,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:05:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:05:43,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:05:43,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-20 12:05:43,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 134 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:43,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:43,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-20 12:05:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:43,584 INFO L130 PetriNetUnfolder]: 291/990 cut-off events. [2022-11-20 12:05:43,584 INFO L131 PetriNetUnfolder]: For 144/152 co-relation queries the response was YES. [2022-11-20 12:05:43,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 990 events. 291/990 cut-off events. For 144/152 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6696 event pairs, 156 based on Foata normal form. 86/758 useless extension candidates. Maximal degree in co-relation 710. Up to 227 conditions per place. [2022-11-20 12:05:43,596 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 44 selfloop transitions, 4 changer transitions 2/149 dead transitions. [2022-11-20 12:05:43,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 149 transitions, 418 flow [2022-11-20 12:05:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:05:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:05:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 647 transitions. [2022-11-20 12:05:43,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8457516339869281 [2022-11-20 12:05:43,621 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 647 transitions. [2022-11-20 12:05:43,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 647 transitions. [2022-11-20 12:05:43,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:43,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 647 transitions. [2022-11-20 12:05:43,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:43,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:43,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:43,669 INFO L175 Difference]: Start difference. First operand has 134 places, 134 transitions, 280 flow. Second operand 5 states and 647 transitions. [2022-11-20 12:05:43,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 149 transitions, 418 flow [2022-11-20 12:05:43,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 149 transitions, 406 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:05:43,682 INFO L231 Difference]: Finished difference. Result has 136 places, 128 transitions, 286 flow [2022-11-20 12:05:43,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2022-11-20 12:05:43,691 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 2 predicate places. [2022-11-20 12:05:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 286 flow [2022-11-20 12:05:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:43,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:43,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:43,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:05:43,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1738197979, now seen corresponding path program 1 times [2022-11-20 12:05:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:43,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414683414] [2022-11-20 12:05:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:43,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:44,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414683414] [2022-11-20 12:05:44,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414683414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:44,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:44,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:05:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855553972] [2022-11-20 12:05:44,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:44,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:05:44,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:05:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:05:44,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-20 12:05:44,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:44,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:44,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-20 12:05:44,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:44,335 INFO L130 PetriNetUnfolder]: 271/782 cut-off events. [2022-11-20 12:05:44,336 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-20 12:05:44,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 782 events. 271/782 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4236 event pairs, 84 based on Foata normal form. 34/508 useless extension candidates. Maximal degree in co-relation 708. Up to 310 conditions per place. [2022-11-20 12:05:44,344 INFO L137 encePairwiseOnDemand]: 142/153 looper letters, 24 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2022-11-20 12:05:44,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 137 transitions, 369 flow [2022-11-20 12:05:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:05:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:05:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2022-11-20 12:05:44,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8671023965141612 [2022-11-20 12:05:44,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2022-11-20 12:05:44,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2022-11-20 12:05:44,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:44,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2022-11-20 12:05:44,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 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) [2022-11-20 12:05:44,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:44,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:44,350 INFO L175 Difference]: Start difference. First operand has 136 places, 128 transitions, 286 flow. Second operand 3 states and 398 transitions. [2022-11-20 12:05:44,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 137 transitions, 369 flow [2022-11-20 12:05:44,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 137 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:05:44,354 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 336 flow [2022-11-20 12:05:44,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=137, PETRI_TRANSITIONS=132} [2022-11-20 12:05:44,355 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 3 predicate places. [2022-11-20 12:05:44,355 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 336 flow [2022-11-20 12:05:44,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:44,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:44,356 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:44,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:05:44,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:44,357 INFO L85 PathProgramCache]: Analyzing trace with hash 806921437, now seen corresponding path program 1 times [2022-11-20 12:05:44,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:44,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737792367] [2022-11-20 12:05:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:44,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:44,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737792367] [2022-11-20 12:05:44,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737792367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252608146] [2022-11-20 12:05:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:44,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:44,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:44,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:44,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:05:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:05:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:44,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:44,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252608146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:44,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:05:44,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 12:05:44,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476276892] [2022-11-20 12:05:44,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:44,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:05:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:05:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:05:44,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-20 12:05:44,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 132 transitions, 336 flow. Second operand has 12 states, 12 states have (on average 119.66666666666667) internal successors, (1436), 12 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:44,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:44,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-20 12:05:44,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:45,421 INFO L130 PetriNetUnfolder]: 551/1714 cut-off events. [2022-11-20 12:05:45,422 INFO L131 PetriNetUnfolder]: For 692/2352 co-relation queries the response was YES. [2022-11-20 12:05:45,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1714 events. 551/1714 cut-off events. For 692/2352 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11607 event pairs, 250 based on Foata normal form. 3/1167 useless extension candidates. Maximal degree in co-relation 869. Up to 382 conditions per place. [2022-11-20 12:05:45,437 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 118 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2022-11-20 12:05:45,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 235 transitions, 988 flow [2022-11-20 12:05:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:05:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:05:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2225 transitions. [2022-11-20 12:05:45,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8079157588961511 [2022-11-20 12:05:45,444 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2225 transitions. [2022-11-20 12:05:45,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2225 transitions. [2022-11-20 12:05:45,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:45,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2225 transitions. [2022-11-20 12:05:45,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 123.61111111111111) internal successors, (2225), 18 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:45,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:45,459 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:45,459 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 336 flow. Second operand 18 states and 2225 transitions. [2022-11-20 12:05:45,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 235 transitions, 988 flow [2022-11-20 12:05:45,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 235 transitions, 942 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 12:05:45,468 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 428 flow [2022-11-20 12:05:45,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=428, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2022-11-20 12:05:45,469 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 22 predicate places. [2022-11-20 12:05:45,469 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 428 flow [2022-11-20 12:05:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.66666666666667) internal successors, (1436), 12 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:45,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:45,470 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:45,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:45,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:45,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash -755238765, now seen corresponding path program 1 times [2022-11-20 12:05:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:45,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604765105] [2022-11-20 12:05:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604765105] [2022-11-20 12:05:45,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604765105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:45,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502943998] [2022-11-20 12:05:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:45,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:45,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:45,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:05:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:05:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:45,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:05:45,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502943998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:45,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:05:45,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 12:05:45,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960692552] [2022-11-20 12:05:45,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:45,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:05:45,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:05:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:05:45,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 153 [2022-11-20 12:05:45,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:45,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:45,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 153 [2022-11-20 12:05:45,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:46,488 INFO L130 PetriNetUnfolder]: 551/1710 cut-off events. [2022-11-20 12:05:46,488 INFO L131 PetriNetUnfolder]: For 307/1167 co-relation queries the response was YES. [2022-11-20 12:05:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 1710 events. 551/1710 cut-off events. For 307/1167 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11565 event pairs, 250 based on Foata normal form. 4/1124 useless extension candidates. Maximal degree in co-relation 2785. Up to 716 conditions per place. [2022-11-20 12:05:46,503 INFO L137 encePairwiseOnDemand]: 148/153 looper letters, 53 selfloop transitions, 11 changer transitions 0/163 dead transitions. [2022-11-20 12:05:46,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 163 transitions, 607 flow [2022-11-20 12:05:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:05:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:05:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 867 transitions. [2022-11-20 12:05:46,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-11-20 12:05:46,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 867 transitions. [2022-11-20 12:05:46,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 867 transitions. [2022-11-20 12:05:46,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:46,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 867 transitions. [2022-11-20 12:05:46,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.85714285714286) internal successors, (867), 7 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:46,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:46,512 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:46,512 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 428 flow. Second operand 7 states and 867 transitions. [2022-11-20 12:05:46,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 163 transitions, 607 flow [2022-11-20 12:05:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 163 transitions, 575 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 12:05:46,518 INFO L231 Difference]: Finished difference. Result has 152 places, 140 transitions, 391 flow [2022-11-20 12:05:46,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=152, PETRI_TRANSITIONS=140} [2022-11-20 12:05:46,520 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 18 predicate places. [2022-11-20 12:05:46,520 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 140 transitions, 391 flow [2022-11-20 12:05:46,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:46,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:46,521 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:46,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:46,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:46,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -446511252, now seen corresponding path program 1 times [2022-11-20 12:05:46,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958711081] [2022-11-20 12:05:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:46,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:46,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958711081] [2022-11-20 12:05:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958711081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:46,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:46,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:05:46,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447109669] [2022-11-20 12:05:46,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:46,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:05:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:05:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:05:46,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 153 [2022-11-20 12:05:46,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 140 transitions, 391 flow. Second operand has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:46,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:46,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 153 [2022-11-20 12:05:46,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:47,174 INFO L130 PetriNetUnfolder]: 576/1665 cut-off events. [2022-11-20 12:05:47,175 INFO L131 PetriNetUnfolder]: For 292/692 co-relation queries the response was YES. [2022-11-20 12:05:47,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1665 events. 576/1665 cut-off events. For 292/692 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 10453 event pairs, 270 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 2632. Up to 864 conditions per place. [2022-11-20 12:05:47,188 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 18 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2022-11-20 12:05:47,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 136 transitions, 419 flow [2022-11-20 12:05:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:05:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:05:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2022-11-20 12:05:47,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8196078431372549 [2022-11-20 12:05:47,190 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2022-11-20 12:05:47,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2022-11-20 12:05:47,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:47,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2022-11-20 12:05:47,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,195 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,195 INFO L175 Difference]: Start difference. First operand has 152 places, 140 transitions, 391 flow. Second operand 5 states and 627 transitions. [2022-11-20 12:05:47,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 136 transitions, 419 flow [2022-11-20 12:05:47,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 136 transitions, 405 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 12:05:47,198 INFO L231 Difference]: Finished difference. Result has 149 places, 136 transitions, 369 flow [2022-11-20 12:05:47,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2022-11-20 12:05:47,199 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 15 predicate places. [2022-11-20 12:05:47,200 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 369 flow [2022-11-20 12:05:47,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:47,201 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:47,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:05:47,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:47,202 INFO L85 PathProgramCache]: Analyzing trace with hash -446511253, now seen corresponding path program 1 times [2022-11-20 12:05:47,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:47,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238070713] [2022-11-20 12:05:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:47,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:47,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238070713] [2022-11-20 12:05:47,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238070713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:47,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:47,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:05:47,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53991261] [2022-11-20 12:05:47,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:47,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:05:47,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:47,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:05:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:05:47,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 153 [2022-11-20 12:05:47,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:47,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 153 [2022-11-20 12:05:47,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:47,708 INFO L130 PetriNetUnfolder]: 906/2500 cut-off events. [2022-11-20 12:05:47,709 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2022-11-20 12:05:47,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 2500 events. 906/2500 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17692 event pairs, 180 based on Foata normal form. 0/1865 useless extension candidates. Maximal degree in co-relation 4953. Up to 1151 conditions per place. [2022-11-20 12:05:47,729 INFO L137 encePairwiseOnDemand]: 150/153 looper letters, 24 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2022-11-20 12:05:47,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 144 transitions, 446 flow [2022-11-20 12:05:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:05:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:05:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2022-11-20 12:05:47,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8758169934640523 [2022-11-20 12:05:47,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2022-11-20 12:05:47,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2022-11-20 12:05:47,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:47,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2022-11-20 12:05:47,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,735 INFO L175 Difference]: Start difference. First operand has 149 places, 136 transitions, 369 flow. Second operand 3 states and 402 transitions. [2022-11-20 12:05:47,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 144 transitions, 446 flow [2022-11-20 12:05:47,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 144 transitions, 438 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:05:47,738 INFO L231 Difference]: Finished difference. Result has 148 places, 136 transitions, 369 flow [2022-11-20 12:05:47,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2022-11-20 12:05:47,741 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 14 predicate places. [2022-11-20 12:05:47,741 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 369 flow [2022-11-20 12:05:47,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:47,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:47,742 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:47,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:05:47,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash -446511287, now seen corresponding path program 1 times [2022-11-20 12:05:47,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:47,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828030827] [2022-11-20 12:05:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:48,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:48,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828030827] [2022-11-20 12:05:48,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828030827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:48,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:48,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:05:48,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537384623] [2022-11-20 12:05:48,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:48,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:05:48,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:05:48,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:05:48,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 153 [2022-11-20 12:05:48,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 369 flow. Second operand has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:48,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:48,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 153 [2022-11-20 12:05:48,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:48,675 INFO L130 PetriNetUnfolder]: 931/2244 cut-off events. [2022-11-20 12:05:48,675 INFO L131 PetriNetUnfolder]: For 340/340 co-relation queries the response was YES. [2022-11-20 12:05:48,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4973 conditions, 2244 events. 931/2244 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15019 event pairs, 460 based on Foata normal form. 23/1647 useless extension candidates. Maximal degree in co-relation 4612. Up to 1241 conditions per place. [2022-11-20 12:05:48,697 INFO L137 encePairwiseOnDemand]: 134/153 looper letters, 42 selfloop transitions, 7 changer transitions 20/163 dead transitions. [2022-11-20 12:05:48,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 163 transitions, 593 flow [2022-11-20 12:05:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:05:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-20 12:05:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1267 transitions. [2022-11-20 12:05:48,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7528223410576351 [2022-11-20 12:05:48,701 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1267 transitions. [2022-11-20 12:05:48,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1267 transitions. [2022-11-20 12:05:48,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:48,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1267 transitions. [2022-11-20 12:05:48,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.18181818181819) internal successors, (1267), 11 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:48,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:48,709 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:48,709 INFO L175 Difference]: Start difference. First operand has 148 places, 136 transitions, 369 flow. Second operand 11 states and 1267 transitions. [2022-11-20 12:05:48,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 163 transitions, 593 flow [2022-11-20 12:05:48,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 163 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:05:48,714 INFO L231 Difference]: Finished difference. Result has 162 places, 136 transitions, 433 flow [2022-11-20 12:05:48,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=433, PETRI_PLACES=162, PETRI_TRANSITIONS=136} [2022-11-20 12:05:48,715 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 28 predicate places. [2022-11-20 12:05:48,715 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 136 transitions, 433 flow [2022-11-20 12:05:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.11111111111111) internal successors, (991), 9 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:48,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:48,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:48,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:05:48,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 586446919, now seen corresponding path program 1 times [2022-11-20 12:05:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:48,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124603856] [2022-11-20 12:05:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:49,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:49,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124603856] [2022-11-20 12:05:49,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124603856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:49,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755115390] [2022-11-20 12:05:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:49,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:49,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:49,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:05:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:05:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:05:49,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:05:49,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755115390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:49,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:05:49,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-20 12:05:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027456060] [2022-11-20 12:05:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:05:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:05:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:05:49,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 153 [2022-11-20 12:05:49,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 136 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:49,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:05:49,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 153 [2022-11-20 12:05:49,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:05:49,944 INFO L130 PetriNetUnfolder]: 569/1443 cut-off events. [2022-11-20 12:05:49,945 INFO L131 PetriNetUnfolder]: For 1786/1882 co-relation queries the response was YES. [2022-11-20 12:05:49,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 1443 events. 569/1443 cut-off events. For 1786/1882 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8610 event pairs, 64 based on Foata normal form. 84/1243 useless extension candidates. Maximal degree in co-relation 4684. Up to 422 conditions per place. [2022-11-20 12:05:49,957 INFO L137 encePairwiseOnDemand]: 140/153 looper letters, 24 selfloop transitions, 11 changer transitions 5/148 dead transitions. [2022-11-20 12:05:49,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 618 flow [2022-11-20 12:05:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:05:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:05:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1087 transitions. [2022-11-20 12:05:49,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7893972403776325 [2022-11-20 12:05:49,961 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1087 transitions. [2022-11-20 12:05:49,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1087 transitions. [2022-11-20 12:05:49,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:05:49,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1087 transitions. [2022-11-20 12:05:49,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.77777777777777) internal successors, (1087), 9 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:49,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:49,967 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 153.0) internal successors, (1530), 10 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:49,967 INFO L175 Difference]: Start difference. First operand has 162 places, 136 transitions, 433 flow. Second operand 9 states and 1087 transitions. [2022-11-20 12:05:49,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 618 flow [2022-11-20 12:05:49,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 575 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-11-20 12:05:49,973 INFO L231 Difference]: Finished difference. Result has 157 places, 131 transitions, 406 flow [2022-11-20 12:05:49,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2022-11-20 12:05:49,974 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 23 predicate places. [2022-11-20 12:05:49,974 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 406 flow [2022-11-20 12:05:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:05:49,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:05:49,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:49,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:50,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:50,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:05:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:50,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1086280732, now seen corresponding path program 1 times [2022-11-20 12:05:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:50,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561897736] [2022-11-20 12:05:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:52,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:52,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561897736] [2022-11-20 12:05:52,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561897736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:05:52,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244122247] [2022-11-20 12:05:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:52,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:52,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:52,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:52,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:05:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 12:05:52,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:52,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:05:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:05:53,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:05:53,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:05:53,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 12:05:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:05:54,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:03,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:06:03,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 12:06:03,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:06:03,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-20 12:06:03,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-20 12:06:03,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-20 12:06:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:05,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244122247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:05,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:05,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 20] total 59 [2022-11-20 12:06:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750874100] [2022-11-20 12:06:05,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:05,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 12:06:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:05,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 12:06:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3261, Unknown=6, NotChecked=0, Total=3540 [2022-11-20 12:06:05,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 153 [2022-11-20 12:06:05,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 131 transitions, 406 flow. Second operand has 60 states, 60 states have (on average 74.2) internal successors, (4452), 60 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:05,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:05,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 153 [2022-11-20 12:06:05,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:09,693 INFO L130 PetriNetUnfolder]: 2092/4505 cut-off events. [2022-11-20 12:06:09,694 INFO L131 PetriNetUnfolder]: For 4145/4429 co-relation queries the response was YES. [2022-11-20 12:06:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13559 conditions, 4505 events. 2092/4505 cut-off events. For 4145/4429 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 31247 event pairs, 1329 based on Foata normal form. 0/3540 useless extension candidates. Maximal degree in co-relation 13433. Up to 3040 conditions per place. [2022-11-20 12:06:09,735 INFO L137 encePairwiseOnDemand]: 118/153 looper letters, 65 selfloop transitions, 42 changer transitions 0/166 dead transitions. [2022-11-20 12:06:09,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 166 transitions, 774 flow [2022-11-20 12:06:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 12:06:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 12:06:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2259 transitions. [2022-11-20 12:06:09,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.492156862745098 [2022-11-20 12:06:09,743 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2259 transitions. [2022-11-20 12:06:09,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2259 transitions. [2022-11-20 12:06:09,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:09,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2259 transitions. [2022-11-20 12:06:09,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 75.3) internal successors, (2259), 30 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 153.0) internal successors, (4743), 31 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,761 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 153.0) internal successors, (4743), 31 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,761 INFO L175 Difference]: Start difference. First operand has 157 places, 131 transitions, 406 flow. Second operand 30 states and 2259 transitions. [2022-11-20 12:06:09,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 166 transitions, 774 flow [2022-11-20 12:06:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 166 transitions, 738 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-20 12:06:09,775 INFO L231 Difference]: Finished difference. Result has 188 places, 157 transitions, 660 flow [2022-11-20 12:06:09,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=660, PETRI_PLACES=188, PETRI_TRANSITIONS=157} [2022-11-20 12:06:09,777 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 54 predicate places. [2022-11-20 12:06:09,777 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 157 transitions, 660 flow [2022-11-20 12:06:09,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 74.2) internal successors, (4452), 60 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:09,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:09,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:09,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:09,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:09,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash 976946277, now seen corresponding path program 1 times [2022-11-20 12:06:09,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:09,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824065935] [2022-11-20 12:06:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:06:10,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824065935] [2022-11-20 12:06:10,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824065935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:10,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:10,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:06:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677151272] [2022-11-20 12:06:10,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:10,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:06:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:10,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:06:10,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:06:10,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 153 [2022-11-20 12:06:10,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 157 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:10,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:10,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 153 [2022-11-20 12:06:10,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:11,393 INFO L130 PetriNetUnfolder]: 1835/4387 cut-off events. [2022-11-20 12:06:11,394 INFO L131 PetriNetUnfolder]: For 15732/16249 co-relation queries the response was YES. [2022-11-20 12:06:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14383 conditions, 4387 events. 1835/4387 cut-off events. For 15732/16249 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 33390 event pairs, 663 based on Foata normal form. 145/4017 useless extension candidates. Maximal degree in co-relation 14253. Up to 1320 conditions per place. [2022-11-20 12:06:11,442 INFO L137 encePairwiseOnDemand]: 146/153 looper letters, 54 selfloop transitions, 12 changer transitions 2/182 dead transitions. [2022-11-20 12:06:11,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 182 transitions, 903 flow [2022-11-20 12:06:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:06:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:06:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 608 transitions. [2022-11-20 12:06:11,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947712418300653 [2022-11-20 12:06:11,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 608 transitions. [2022-11-20 12:06:11,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 608 transitions. [2022-11-20 12:06:11,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:11,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 608 transitions. [2022-11-20 12:06:11,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.6) internal successors, (608), 5 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:11,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:11,449 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 153.0) internal successors, (918), 6 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:11,450 INFO L175 Difference]: Start difference. First operand has 188 places, 157 transitions, 660 flow. Second operand 5 states and 608 transitions. [2022-11-20 12:06:11,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 182 transitions, 903 flow [2022-11-20 12:06:11,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 182 transitions, 845 flow, removed 14 selfloop flow, removed 15 redundant places. [2022-11-20 12:06:11,466 INFO L231 Difference]: Finished difference. Result has 178 places, 160 transitions, 653 flow [2022-11-20 12:06:11,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=653, PETRI_PLACES=178, PETRI_TRANSITIONS=160} [2022-11-20 12:06:11,468 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 44 predicate places. [2022-11-20 12:06:11,468 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 160 transitions, 653 flow [2022-11-20 12:06:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.83333333333333) internal successors, (683), 6 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:11,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:11,469 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:06:11,469 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1475869979, now seen corresponding path program 2 times [2022-11-20 12:06:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704573786] [2022-11-20 12:06:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:11,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704573786] [2022-11-20 12:06:11,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704573786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186567844] [2022-11-20 12:06:11,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:06:11,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:11,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:11,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:06:11,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:06:11,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:06:11,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 12:06:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 12:06:12,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186567844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:12,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:12,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 12:06:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97847566] [2022-11-20 12:06:12,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:12,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:06:12,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:12,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:06:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:06:12,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 153 [2022-11-20 12:06:12,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 160 transitions, 653 flow. Second operand has 18 states, 18 states have (on average 109.61111111111111) internal successors, (1973), 18 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:12,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:12,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 153 [2022-11-20 12:06:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:13,556 INFO L130 PetriNetUnfolder]: 955/3189 cut-off events. [2022-11-20 12:06:13,557 INFO L131 PetriNetUnfolder]: For 14303/14655 co-relation queries the response was YES. [2022-11-20 12:06:13,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10551 conditions, 3189 events. 955/3189 cut-off events. For 14303/14655 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 25157 event pairs, 625 based on Foata normal form. 2/2906 useless extension candidates. Maximal degree in co-relation 10428. Up to 845 conditions per place. [2022-11-20 12:06:13,590 INFO L137 encePairwiseOnDemand]: 142/153 looper letters, 120 selfloop transitions, 25 changer transitions 0/250 dead transitions. [2022-11-20 12:06:13,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 250 transitions, 1601 flow [2022-11-20 12:06:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:06:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 12:06:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2667 transitions. [2022-11-20 12:06:13,600 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7263071895424836 [2022-11-20 12:06:13,601 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2667 transitions. [2022-11-20 12:06:13,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2667 transitions. [2022-11-20 12:06:13,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:13,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2667 transitions. [2022-11-20 12:06:13,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 111.125) internal successors, (2667), 24 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,635 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 153.0) internal successors, (3825), 25 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,635 INFO L175 Difference]: Start difference. First operand has 178 places, 160 transitions, 653 flow. Second operand 24 states and 2667 transitions. [2022-11-20 12:06:13,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 250 transitions, 1601 flow [2022-11-20 12:06:13,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 250 transitions, 1584 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 12:06:13,651 INFO L231 Difference]: Finished difference. Result has 196 places, 164 transitions, 712 flow [2022-11-20 12:06:13,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=712, PETRI_PLACES=196, PETRI_TRANSITIONS=164} [2022-11-20 12:06:13,653 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 62 predicate places. [2022-11-20 12:06:13,653 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 164 transitions, 712 flow [2022-11-20 12:06:13,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.61111111111111) internal successors, (1973), 18 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:13,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:13,654 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:13,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:06:13,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1189873969, now seen corresponding path program 1 times [2022-11-20 12:06:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:13,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292694135] [2022-11-20 12:06:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:06:14,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:14,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292694135] [2022-11-20 12:06:14,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292694135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:14,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:14,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:06:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790238475] [2022-11-20 12:06:14,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:06:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:06:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:06:14,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 153 [2022-11-20 12:06:14,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 164 transitions, 712 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:14,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:14,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 153 [2022-11-20 12:06:14,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:15,338 INFO L130 PetriNetUnfolder]: 1731/5456 cut-off events. [2022-11-20 12:06:15,339 INFO L131 PetriNetUnfolder]: For 31562/32285 co-relation queries the response was YES. [2022-11-20 12:06:15,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18394 conditions, 5456 events. 1731/5456 cut-off events. For 31562/32285 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 46840 event pairs, 580 based on Foata normal form. 251/5281 useless extension candidates. Maximal degree in co-relation 11362. Up to 1482 conditions per place. [2022-11-20 12:06:15,536 INFO L137 encePairwiseOnDemand]: 147/153 looper letters, 30 selfloop transitions, 13 changer transitions 0/184 dead transitions. [2022-11-20 12:06:15,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 184 transitions, 962 flow [2022-11-20 12:06:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:06:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:06:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 526 transitions. [2022-11-20 12:06:15,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8594771241830066 [2022-11-20 12:06:15,539 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 526 transitions. [2022-11-20 12:06:15,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 526 transitions. [2022-11-20 12:06:15,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:15,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 526 transitions. [2022-11-20 12:06:15,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,543 INFO L175 Difference]: Start difference. First operand has 196 places, 164 transitions, 712 flow. Second operand 4 states and 526 transitions. [2022-11-20 12:06:15,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 184 transitions, 962 flow [2022-11-20 12:06:15,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 184 transitions, 904 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-20 12:06:15,562 INFO L231 Difference]: Finished difference. Result has 184 places, 175 transitions, 826 flow [2022-11-20 12:06:15,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=826, PETRI_PLACES=184, PETRI_TRANSITIONS=175} [2022-11-20 12:06:15,564 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 50 predicate places. [2022-11-20 12:06:15,565 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 175 transitions, 826 flow [2022-11-20 12:06:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:15,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:15,565 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:15,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:06:15,566 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 390826221, now seen corresponding path program 1 times [2022-11-20 12:06:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:15,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505468573] [2022-11-20 12:06:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:06:16,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505468573] [2022-11-20 12:06:16,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505468573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:16,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:16,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:06:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374411585] [2022-11-20 12:06:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:16,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:06:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:06:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:06:16,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 153 [2022-11-20 12:06:16,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 175 transitions, 826 flow. Second operand has 12 states, 12 states have (on average 94.75) internal successors, (1137), 12 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:16,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:16,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 153 [2022-11-20 12:06:16,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:18,528 INFO L130 PetriNetUnfolder]: 3530/8891 cut-off events. [2022-11-20 12:06:18,529 INFO L131 PetriNetUnfolder]: For 67426/69011 co-relation queries the response was YES. [2022-11-20 12:06:18,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33400 conditions, 8891 events. 3530/8891 cut-off events. For 67426/69011 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 75456 event pairs, 795 based on Foata normal form. 304/8645 useless extension candidates. Maximal degree in co-relation 23000. Up to 3441 conditions per place. [2022-11-20 12:06:18,638 INFO L137 encePairwiseOnDemand]: 139/153 looper letters, 63 selfloop transitions, 24 changer transitions 2/190 dead transitions. [2022-11-20 12:06:18,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 190 transitions, 1074 flow [2022-11-20 12:06:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:06:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 12:06:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1254 transitions. [2022-11-20 12:06:18,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6304675716440422 [2022-11-20 12:06:18,643 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1254 transitions. [2022-11-20 12:06:18,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1254 transitions. [2022-11-20 12:06:18,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:18,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1254 transitions. [2022-11-20 12:06:18,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 96.46153846153847) internal successors, (1254), 13 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 153.0) internal successors, (2142), 14 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,651 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 153.0) internal successors, (2142), 14 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,652 INFO L175 Difference]: Start difference. First operand has 184 places, 175 transitions, 826 flow. Second operand 13 states and 1254 transitions. [2022-11-20 12:06:18,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 190 transitions, 1074 flow [2022-11-20 12:06:18,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 190 transitions, 1074 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:06:18,682 INFO L231 Difference]: Finished difference. Result has 197 places, 175 transitions, 889 flow [2022-11-20 12:06:18,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=889, PETRI_PLACES=197, PETRI_TRANSITIONS=175} [2022-11-20 12:06:18,684 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 63 predicate places. [2022-11-20 12:06:18,684 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 175 transitions, 889 flow [2022-11-20 12:06:18,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 94.75) internal successors, (1137), 12 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:18,685 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:18,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:06:18,685 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash -853729625, now seen corresponding path program 1 times [2022-11-20 12:06:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:18,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711377403] [2022-11-20 12:06:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:06:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711377403] [2022-11-20 12:06:18,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711377403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:06:18,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:06:18,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:06:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193036345] [2022-11-20 12:06:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:06:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:06:18,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:06:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:06:18,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 153 [2022-11-20 12:06:18,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 175 transitions, 889 flow. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:18,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:18,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 153 [2022-11-20 12:06:18,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:20,884 INFO L130 PetriNetUnfolder]: 3274/9706 cut-off events. [2022-11-20 12:06:20,884 INFO L131 PetriNetUnfolder]: For 86201/86995 co-relation queries the response was YES. [2022-11-20 12:06:20,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40379 conditions, 9706 events. 3274/9706 cut-off events. For 86201/86995 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 93101 event pairs, 959 based on Foata normal form. 392/9189 useless extension candidates. Maximal degree in co-relation 13082. Up to 2581 conditions per place. [2022-11-20 12:06:20,978 INFO L137 encePairwiseOnDemand]: 149/153 looper letters, 38 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2022-11-20 12:06:20,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 185 transitions, 1112 flow [2022-11-20 12:06:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:06:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:06:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2022-11-20 12:06:20,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8545751633986928 [2022-11-20 12:06:20,980 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2022-11-20 12:06:20,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2022-11-20 12:06:20,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:20,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2022-11-20 12:06:20,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:20,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:20,983 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:20,983 INFO L175 Difference]: Start difference. First operand has 197 places, 175 transitions, 889 flow. Second operand 4 states and 523 transitions. [2022-11-20 12:06:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 185 transitions, 1112 flow [2022-11-20 12:06:20,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 185 transitions, 1073 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-20 12:06:21,000 INFO L231 Difference]: Finished difference. Result has 191 places, 172 transitions, 824 flow [2022-11-20 12:06:21,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=824, PETRI_PLACES=191, PETRI_TRANSITIONS=172} [2022-11-20 12:06:21,001 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 57 predicate places. [2022-11-20 12:06:21,002 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 172 transitions, 824 flow [2022-11-20 12:06:21,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:21,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:21,003 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:21,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:06:21,003 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash 900431164, now seen corresponding path program 1 times [2022-11-20 12:06:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:21,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402950165] [2022-11-20 12:06:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:21,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:21,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402950165] [2022-11-20 12:06:21,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402950165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:21,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708232981] [2022-11-20 12:06:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:21,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:21,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:21,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:21,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:06:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:06:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:22,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:22,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708232981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:22,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:22,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 30 [2022-11-20 12:06:22,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474694276] [2022-11-20 12:06:22,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:22,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 12:06:22,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 12:06:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:06:22,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 153 [2022-11-20 12:06:22,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 172 transitions, 824 flow. Second operand has 30 states, 30 states have (on average 104.16666666666667) internal successors, (3125), 30 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:22,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:22,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 153 [2022-11-20 12:06:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:26,220 INFO L130 PetriNetUnfolder]: 3212/9378 cut-off events. [2022-11-20 12:06:26,220 INFO L131 PetriNetUnfolder]: For 72419/73495 co-relation queries the response was YES. [2022-11-20 12:06:26,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36735 conditions, 9378 events. 3212/9378 cut-off events. For 72419/73495 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 89220 event pairs, 1280 based on Foata normal form. 359/8937 useless extension candidates. Maximal degree in co-relation 10140. Up to 3600 conditions per place. [2022-11-20 12:06:26,297 INFO L137 encePairwiseOnDemand]: 132/153 looper letters, 62 selfloop transitions, 22 changer transitions 114/284 dead transitions. [2022-11-20 12:06:26,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 284 transitions, 1775 flow [2022-11-20 12:06:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 12:06:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 12:06:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3316 transitions. [2022-11-20 12:06:26,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6991355682057769 [2022-11-20 12:06:26,304 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3316 transitions. [2022-11-20 12:06:26,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3316 transitions. [2022-11-20 12:06:26,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:26,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3316 transitions. [2022-11-20 12:06:26,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 106.96774193548387) internal successors, (3316), 31 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:26,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 153.0) internal successors, (4896), 32 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:26,321 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 153.0) internal successors, (4896), 32 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:26,321 INFO L175 Difference]: Start difference. First operand has 191 places, 172 transitions, 824 flow. Second operand 31 states and 3316 transitions. [2022-11-20 12:06:26,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 284 transitions, 1775 flow [2022-11-20 12:06:26,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 284 transitions, 1770 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 12:06:26,340 INFO L231 Difference]: Finished difference. Result has 235 places, 150 transitions, 803 flow [2022-11-20 12:06:26,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=803, PETRI_PLACES=235, PETRI_TRANSITIONS=150} [2022-11-20 12:06:26,341 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 101 predicate places. [2022-11-20 12:06:26,342 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 150 transitions, 803 flow [2022-11-20 12:06:26,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.16666666666667) internal successors, (3125), 30 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:26,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:26,343 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:26,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:26,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:06:26,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 695165534, now seen corresponding path program 2 times [2022-11-20 12:06:26,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:26,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388342757] [2022-11-20 12:06:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:29,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388342757] [2022-11-20 12:06:29,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388342757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:29,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18969587] [2022-11-20 12:06:29,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:06:29,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:29,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:29,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:06:29,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:06:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:06:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:06:29,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:06:30,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:31,374 INFO L321 Elim1Store]: treesize reduction 26, result has 60.0 percent of original size [2022-11-20 12:06:31,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 56 [2022-11-20 12:06:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:06:32,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18969587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:32,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 6] total 39 [2022-11-20 12:06:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978600992] [2022-11-20 12:06:32,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 12:06:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 12:06:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:06:32,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 153 [2022-11-20 12:06:32,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 150 transitions, 803 flow. Second operand has 40 states, 40 states have (on average 78.0) internal successors, (3120), 40 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:32,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:32,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 153 [2022-11-20 12:06:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:06:47,251 INFO L130 PetriNetUnfolder]: 16840/35414 cut-off events. [2022-11-20 12:06:47,251 INFO L131 PetriNetUnfolder]: For 1181022/1185435 co-relation queries the response was YES. [2022-11-20 12:06:47,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246171 conditions, 35414 events. 16840/35414 cut-off events. For 1181022/1185435 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 338839 event pairs, 3372 based on Foata normal form. 812/34606 useless extension candidates. Maximal degree in co-relation 184236. Up to 10230 conditions per place. [2022-11-20 12:06:47,930 INFO L137 encePairwiseOnDemand]: 122/153 looper letters, 250 selfloop transitions, 125 changer transitions 4/443 dead transitions. [2022-11-20 12:06:47,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 443 transitions, 4733 flow [2022-11-20 12:06:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 12:06:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-20 12:06:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3906 transitions. [2022-11-20 12:06:47,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5318627450980392 [2022-11-20 12:06:47,942 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3906 transitions. [2022-11-20 12:06:47,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3906 transitions. [2022-11-20 12:06:47,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:06:47,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3906 transitions. [2022-11-20 12:06:47,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 81.375) internal successors, (3906), 48 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:47,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 153.0) internal successors, (7497), 49 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:47,972 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 153.0) internal successors, (7497), 49 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:47,973 INFO L175 Difference]: Start difference. First operand has 235 places, 150 transitions, 803 flow. Second operand 48 states and 3906 transitions. [2022-11-20 12:06:47,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 443 transitions, 4733 flow [2022-11-20 12:06:49,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 443 transitions, 3517 flow, removed 588 selfloop flow, removed 31 redundant places. [2022-11-20 12:06:49,181 INFO L231 Difference]: Finished difference. Result has 250 places, 255 transitions, 2410 flow [2022-11-20 12:06:49,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2410, PETRI_PLACES=250, PETRI_TRANSITIONS=255} [2022-11-20 12:06:49,182 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 116 predicate places. [2022-11-20 12:06:49,182 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 255 transitions, 2410 flow [2022-11-20 12:06:49,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 78.0) internal successors, (3120), 40 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:49,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:06:49,184 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:06:49,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:49,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:49,390 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:06:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:06:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2066562365, now seen corresponding path program 1 times [2022-11-20 12:06:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:06:49,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003230077] [2022-11-20 12:06:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:06:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:52,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:06:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003230077] [2022-11-20 12:06:52,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003230077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:06:52,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53627583] [2022-11-20 12:06:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:06:52,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:06:52,175 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:06:52,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:06:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:06:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 12:06:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:06:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:53,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:06:53,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:06:53,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-11-20 12:06:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:06:55,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53627583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:06:55,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:06:55,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 15] total 55 [2022-11-20 12:06:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077317314] [2022-11-20 12:06:55,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:06:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:06:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:06:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:06:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=2445, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:06:55,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 153 [2022-11-20 12:06:55,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 255 transitions, 2410 flow. Second operand has 56 states, 56 states have (on average 76.85714285714286) internal successors, (4304), 56 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:06:55,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:06:55,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 153 [2022-11-20 12:06:55,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:07:25,681 INFO L130 PetriNetUnfolder]: 27595/59074 cut-off events. [2022-11-20 12:07:25,681 INFO L131 PetriNetUnfolder]: For 1590767/1598704 co-relation queries the response was YES. [2022-11-20 12:07:26,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376926 conditions, 59074 events. 27595/59074 cut-off events. For 1590767/1598704 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 626222 event pairs, 2929 based on Foata normal form. 4154/60965 useless extension candidates. Maximal degree in co-relation 249996. Up to 19501 conditions per place. [2022-11-20 12:07:26,999 INFO L137 encePairwiseOnDemand]: 123/153 looper letters, 547 selfloop transitions, 441 changer transitions 77/1129 dead transitions. [2022-11-20 12:07:26,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1129 transitions, 16342 flow [2022-11-20 12:07:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-20 12:07:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-11-20 12:07:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 8626 transitions. [2022-11-20 12:07:27,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5318781600690591 [2022-11-20 12:07:27,036 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 8626 transitions. [2022-11-20 12:07:27,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 8626 transitions. [2022-11-20 12:07:27,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:07:27,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 8626 transitions. [2022-11-20 12:07:27,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 81.37735849056604) internal successors, (8626), 106 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:27,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 153.0) internal successors, (16371), 107 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:27,109 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 153.0) internal successors, (16371), 107 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:27,109 INFO L175 Difference]: Start difference. First operand has 250 places, 255 transitions, 2410 flow. Second operand 106 states and 8626 transitions. [2022-11-20 12:07:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1129 transitions, 16342 flow [2022-11-20 12:07:31,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1129 transitions, 15163 flow, removed 535 selfloop flow, removed 17 redundant places. [2022-11-20 12:07:31,650 INFO L231 Difference]: Finished difference. Result has 378 places, 691 transitions, 10882 flow [2022-11-20 12:07:31,650 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=10882, PETRI_PLACES=378, PETRI_TRANSITIONS=691} [2022-11-20 12:07:31,651 INFO L288 CegarLoopForPetriNet]: 134 programPoint places, 244 predicate places. [2022-11-20 12:07:31,651 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 691 transitions, 10882 flow [2022-11-20 12:07:31,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 76.85714285714286) internal successors, (4304), 56 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:31,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:07:31,653 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:07:31,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:07:31,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:07:31,860 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-20 12:07:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:07:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1064593156, now seen corresponding path program 3 times [2022-11-20 12:07:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:07:31,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513604750] [2022-11-20 12:07:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:07:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:07:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:07:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:07:32,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:07:32,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513604750] [2022-11-20 12:07:32,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513604750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:07:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408131861] [2022-11-20 12:07:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:07:32,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:07:32,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:07:32,571 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:07:32,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f09cd6a2-b0d1-4169-a4fb-d21f15647147/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:07:33,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:07:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:07:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:07:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:07:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:07:33,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:07:33,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:07:33,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 70 [2022-11-20 12:07:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 12:07:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408131861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:07:34,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:07:34,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-11-20 12:07:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134901155] [2022-11-20 12:07:34,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:07:34,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:07:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:07:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:07:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:07:34,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 153 [2022-11-20 12:07:34,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 691 transitions, 10882 flow. Second operand has 18 states, 18 states have (on average 113.77777777777777) internal successors, (2048), 18 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:07:34,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:07:34,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 153 [2022-11-20 12:07:34,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand