./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.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_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/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_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/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_b683aa85-f92d-4152-b32d-8a41bdf02c65/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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- 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 09:27:49,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:49,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:49,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:49,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:49,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:49,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:49,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:49,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:49,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:49,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:49,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:49,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:49,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:49,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:49,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:49,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:49,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:49,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:49,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:49,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:49,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:49,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:49,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:49,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:49,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:49,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:49,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:49,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:49,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:49,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:49,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:49,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:49,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:49,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:49,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:49,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:49,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:49,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:49,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:49,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:49,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 09:27:49,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:49,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:49,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:49,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:49,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:49,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:49,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:49,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:49,444 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:49,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:49,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:49,445 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:49,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:49,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:49,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:49,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:49,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:49,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:49,447 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 09:27:49,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:49,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:49,448 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:49,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:49,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:49,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:49,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:49,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:49,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:49,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:49,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:49,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:49,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:49,450 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:49,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:49,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:49,451 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_b683aa85-f92d-4152-b32d-8a41bdf02c65/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-20 09:27:49,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:49,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:49,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:49,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:49,768 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:49,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-20 09:27:52,772 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:52,983 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:52,983 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-20 09:27:52,989 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/data/a6833c1ce/5ab415a8fe6742dd9128c8add4c2988f/FLAGa1347dda3 [2022-11-20 09:27:53,007 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/data/a6833c1ce/5ab415a8fe6742dd9128c8add4c2988f [2022-11-20 09:27:53,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:53,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:53,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:53,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:53,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:53,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb2ca03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53, skipping insertion in model container [2022-11-20 09:27:53,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:53,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:53,213 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_b683aa85-f92d-4152-b32d-8a41bdf02c65/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-20 09:27:53,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:53,223 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:53,240 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_b683aa85-f92d-4152-b32d-8a41bdf02c65/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-20 09:27:53,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:53,255 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:53,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53 WrapperNode [2022-11-20 09:27:53,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:53,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:53,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:53,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:53,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,293 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-20 09:27:53,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:53,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:53,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:53,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:53,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:53,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:53,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:53,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:53,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:53,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:53,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:27:53,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:27:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:27:53,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:27:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:53,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:53,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:27:53,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 09:27:53,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 09:27:53,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:53,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:53,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:27:53,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:53,409 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 09:27:53,516 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:53,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:53,782 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:53,912 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:53,912 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:27:53,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:53 BoogieIcfgContainer [2022-11-20 09:27:53,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:53,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:53,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:53,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:53,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:53" (1/3) ... [2022-11-20 09:27:53,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168489b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:53, skipping insertion in model container [2022-11-20 09:27:53,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (2/3) ... [2022-11-20 09:27:53,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168489b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:53, skipping insertion in model container [2022-11-20 09:27:53,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:53" (3/3) ... [2022-11-20 09:27:53,924 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-20 09:27:53,933 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:27:53,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:53,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-20 09:27:53,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:27:54,020 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 09:27:54,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2022-11-20 09:27:54,129 INFO L130 PetriNetUnfolder]: 5/86 cut-off events. [2022-11-20 09:27:54,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 09:27:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-11-20 09:27:54,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2022-11-20 09:27:54,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 67 transitions, 143 flow [2022-11-20 09:27:54,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:54,158 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;@6df2f2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:54,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-20 09:27:54,168 INFO L130 PetriNetUnfolder]: 1/31 cut-off events. [2022-11-20 09:27:54,168 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:54,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:54,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:54,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash -120636830, now seen corresponding path program 1 times [2022-11-20 09:27:54,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87131473] [2022-11-20 09:27:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,500 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 09:27:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87131473] [2022-11-20 09:27:54,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87131473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:54,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:54,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:54,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89464042] [2022-11-20 09:27:54,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:54,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:27:54,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:54,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:27:54,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:54,621 INFO L130 PetriNetUnfolder]: 18/144 cut-off events. [2022-11-20 09:27:54,621 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 09:27:54,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 144 events. 18/144 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 462 event pairs, 8 based on Foata normal form. 15/126 useless extension candidates. Maximal degree in co-relation 130. Up to 31 conditions per place. [2022-11-20 09:27:54,624 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 9 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2022-11-20 09:27:54,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 173 flow [2022-11-20 09:27:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-20 09:27:54,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-11-20 09:27:54,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-20 09:27:54,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-20 09:27:54,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:54,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-20 09:27:54,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 09:27:54,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 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 09:27:54,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 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 09:27:54,652 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 143 flow. Second operand 3 states and 238 transitions. [2022-11-20 09:27:54,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 173 flow [2022-11-20 09:27:54,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 165 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 09:27:54,661 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 150 flow [2022-11-20 09:27:54,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-20 09:27:54,666 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2022-11-20 09:27:54,666 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 150 flow [2022-11-20 09:27:54,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:54,667 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] [2022-11-20 09:27:54,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:54,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 32133125, now seen corresponding path program 1 times [2022-11-20 09:27:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655612154] [2022-11-20 09:27:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,811 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 09:27:54,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655612154] [2022-11-20 09:27:54,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655612154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:54,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:54,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57999057] [2022-11-20 09:27:54,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:54,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:54,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 09:27:54,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:54,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 09:27:54,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:54,962 INFO L130 PetriNetUnfolder]: 94/248 cut-off events. [2022-11-20 09:27:54,962 INFO L131 PetriNetUnfolder]: For 35/42 co-relation queries the response was YES. [2022-11-20 09:27:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 248 events. 94/248 cut-off events. For 35/42 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1132 event pairs, 3 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 378. Up to 122 conditions per place. [2022-11-20 09:27:54,966 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 30 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2022-11-20 09:27:54,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 275 flow [2022-11-20 09:27:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:27:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 358 transitions. [2022-11-20 09:27:54,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8136363636363636 [2022-11-20 09:27:54,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 358 transitions. [2022-11-20 09:27:54,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 358 transitions. [2022-11-20 09:27:54,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:54,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 358 transitions. [2022-11-20 09:27:54,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 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 09:27:54,976 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 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 09:27:54,976 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 150 flow. Second operand 5 states and 358 transitions. [2022-11-20 09:27:54,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 275 flow [2022-11-20 09:27:54,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:54,979 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2022-11-20 09:27:54,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-20 09:27:54,980 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 5 predicate places. [2022-11-20 09:27:54,980 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2022-11-20 09:27:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:54,981 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] [2022-11-20 09:27:54,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:27:54,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1013911830, now seen corresponding path program 1 times [2022-11-20 09:27:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728027563] [2022-11-20 09:27:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728027563] [2022-11-20 09:27:55,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728027563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291241590] [2022-11-20 09:27:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:55,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:55,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:27:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291241590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:55,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:55,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 09:27:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390278478] [2022-11-20 09:27:55,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:55,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:27:55,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:27:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:27:55,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:27:55,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:55,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:27:55,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:55,561 INFO L130 PetriNetUnfolder]: 42/296 cut-off events. [2022-11-20 09:27:55,565 INFO L131 PetriNetUnfolder]: For 44/48 co-relation queries the response was YES. [2022-11-20 09:27:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 296 events. 42/296 cut-off events. For 44/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1292 event pairs, 3 based on Foata normal form. 5/248 useless extension candidates. Maximal degree in co-relation 435. Up to 59 conditions per place. [2022-11-20 09:27:55,570 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 17 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2022-11-20 09:27:55,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 308 flow [2022-11-20 09:27:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:27:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:27:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 544 transitions. [2022-11-20 09:27:55,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8831168831168831 [2022-11-20 09:27:55,580 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 544 transitions. [2022-11-20 09:27:55,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 544 transitions. [2022-11-20 09:27:55,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:55,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 544 transitions. [2022-11-20 09:27:55,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 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 09:27:55,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 09:27:55,591 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 09:27:55,591 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 7 states and 544 transitions. [2022-11-20 09:27:55,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 308 flow [2022-11-20 09:27:55,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:55,599 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 285 flow [2022-11-20 09:27:55,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2022-11-20 09:27:55,600 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-11-20 09:27:55,604 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 285 flow [2022-11-20 09:27:55,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:55,605 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] [2022-11-20 09:27:55,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 09:27:55,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:55,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1013911831, now seen corresponding path program 1 times [2022-11-20 09:27:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:55,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664218291] [2022-11-20 09:27:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:55,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664218291] [2022-11-20 09:27:55,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664218291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:55,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214656357] [2022-11-20 09:27:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:55,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:55,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:27:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:56,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214656357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:56,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:56,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-20 09:27:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061010436] [2022-11-20 09:27:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:56,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:27:56,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:27:56,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:56,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:27:56,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:56,138 INFO L130 PetriNetUnfolder]: 40/324 cut-off events. [2022-11-20 09:27:56,138 INFO L131 PetriNetUnfolder]: For 600/664 co-relation queries the response was YES. [2022-11-20 09:27:56,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 324 events. 40/324 cut-off events. For 600/664 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1425 event pairs, 2 based on Foata normal form. 20/312 useless extension candidates. Maximal degree in co-relation 558. Up to 57 conditions per place. [2022-11-20 09:27:56,142 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 12 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2022-11-20 09:27:56,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 357 flow [2022-11-20 09:27:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 09:27:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 304 transitions. [2022-11-20 09:27:56,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8636363636363636 [2022-11-20 09:27:56,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 304 transitions. [2022-11-20 09:27:56,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 304 transitions. [2022-11-20 09:27:56,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:56,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 304 transitions. [2022-11-20 09:27:56,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 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 09:27:56,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 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 09:27:56,148 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 285 flow. Second operand 4 states and 304 transitions. [2022-11-20 09:27:56,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 357 flow [2022-11-20 09:27:56,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 341 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:56,153 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 339 flow [2022-11-20 09:27:56,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2022-11-20 09:27:56,154 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 17 predicate places. [2022-11-20 09:27:56,154 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 339 flow [2022-11-20 09:27:56,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:56,155 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:56,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:27:56,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:56,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash -588297799, now seen corresponding path program 1 times [2022-11-20 09:27:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:56,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422760724] [2022-11-20 09:27:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422760724] [2022-11-20 09:27:56,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422760724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161645861] [2022-11-20 09:27:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:56,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:56,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:27:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:27:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161645861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:56,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:56,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 09:27:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197720734] [2022-11-20 09:27:56,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:56,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:27:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:27:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:56,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 09:27:56,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:56,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 09:27:56,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:57,174 INFO L130 PetriNetUnfolder]: 302/1016 cut-off events. [2022-11-20 09:27:57,175 INFO L131 PetriNetUnfolder]: For 4293/4293 co-relation queries the response was YES. [2022-11-20 09:27:57,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1016 events. 302/1016 cut-off events. For 4293/4293 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6033 event pairs, 16 based on Foata normal form. 22/924 useless extension candidates. Maximal degree in co-relation 2971. Up to 230 conditions per place. [2022-11-20 09:27:57,187 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 131 selfloop transitions, 18 changer transitions 2/197 dead transitions. [2022-11-20 09:27:57,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 197 transitions, 1634 flow [2022-11-20 09:27:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:27:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 09:27:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1247 transitions. [2022-11-20 09:27:57,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7872474747474747 [2022-11-20 09:27:57,191 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1247 transitions. [2022-11-20 09:27:57,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1247 transitions. [2022-11-20 09:27:57,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:57,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1247 transitions. [2022-11-20 09:27:57,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.27777777777777) internal successors, (1247), 18 states have internal predecessors, (1247), 0 states have call successors, (0), 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 09:27:57,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 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 09:27:57,198 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 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 09:27:57,198 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 339 flow. Second operand 18 states and 1247 transitions. [2022-11-20 09:27:57,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 197 transitions, 1634 flow [2022-11-20 09:27:57,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1457 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:57,207 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 416 flow [2022-11-20 09:27:57,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=416, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2022-11-20 09:27:57,208 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2022-11-20 09:27:57,209 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 416 flow [2022-11-20 09:27:57,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.66666666666667) internal successors, (800), 12 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:57,210 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:57,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:57,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1057362306, now seen corresponding path program 1 times [2022-11-20 09:27:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:57,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929321051] [2022-11-20 09:27:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929321051] [2022-11-20 09:27:57,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929321051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725226192] [2022-11-20 09:27:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:57,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:57,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:57,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:27:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:27:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:57,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725226192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:57,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:57,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:27:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67845494] [2022-11-20 09:27:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:27:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:27:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:27:57,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 09:27:57,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 416 flow. Second operand has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:57,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 09:27:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:57,943 INFO L130 PetriNetUnfolder]: 270/944 cut-off events. [2022-11-20 09:27:57,944 INFO L131 PetriNetUnfolder]: For 2574/2657 co-relation queries the response was YES. [2022-11-20 09:27:57,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 944 events. 270/944 cut-off events. For 2574/2657 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5887 event pairs, 37 based on Foata normal form. 52/858 useless extension candidates. Maximal degree in co-relation 2508. Up to 266 conditions per place. [2022-11-20 09:27:57,956 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 46 selfloop transitions, 11 changer transitions 2/105 dead transitions. [2022-11-20 09:27:57,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 630 flow [2022-11-20 09:27:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:27:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:27:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 484 transitions. [2022-11-20 09:27:57,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-11-20 09:27:57,959 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 484 transitions. [2022-11-20 09:27:57,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 484 transitions. [2022-11-20 09:27:57,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:57,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 484 transitions. [2022-11-20 09:27:57,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.14285714285714) internal successors, (484), 7 states have internal predecessors, (484), 0 states have call successors, (0), 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 09:27:57,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 09:27:57,965 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 09:27:57,965 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 416 flow. Second operand 7 states and 484 transitions. [2022-11-20 09:27:57,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 630 flow [2022-11-20 09:27:57,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 105 transitions, 598 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 09:27:57,974 INFO L231 Difference]: Finished difference. Result has 103 places, 86 transitions, 379 flow [2022-11-20 09:27:57,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2022-11-20 09:27:57,977 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 33 predicate places. [2022-11-20 09:27:57,978 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 379 flow [2022-11-20 09:27:57,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:57,979 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] [2022-11-20 09:27:57,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -365327580, now seen corresponding path program 1 times [2022-11-20 09:27:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:58,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716716843] [2022-11-20 09:27:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,249 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 09:27:58,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716716843] [2022-11-20 09:27:58,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716716843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:58,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:58,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981425892] [2022-11-20 09:27:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:58,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:58,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 09:27:58,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 86 transitions, 379 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 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 09:27:58,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:58,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 09:27:58,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:58,553 INFO L130 PetriNetUnfolder]: 456/1410 cut-off events. [2022-11-20 09:27:58,553 INFO L131 PetriNetUnfolder]: For 2871/3061 co-relation queries the response was YES. [2022-11-20 09:27:58,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3760 conditions, 1410 events. 456/1410 cut-off events. For 2871/3061 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11757 event pairs, 228 based on Foata normal form. 28/1093 useless extension candidates. Maximal degree in co-relation 3574. Up to 716 conditions per place. [2022-11-20 09:27:58,565 INFO L137 encePairwiseOnDemand]: 82/88 looper letters, 67 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2022-11-20 09:27:58,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 839 flow [2022-11-20 09:27:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:27:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2022-11-20 09:27:58,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8113636363636364 [2022-11-20 09:27:58,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2022-11-20 09:27:58,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2022-11-20 09:27:58,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:58,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2022-11-20 09:27:58,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 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 09:27:58,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 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 09:27:58,570 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 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 09:27:58,570 INFO L175 Difference]: Start difference. First operand has 103 places, 86 transitions, 379 flow. Second operand 5 states and 357 transitions. [2022-11-20 09:27:58,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 839 flow [2022-11-20 09:27:58,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 128 transitions, 825 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:27:58,576 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 395 flow [2022-11-20 09:27:58,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2022-11-20 09:27:58,577 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 35 predicate places. [2022-11-20 09:27:58,577 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 395 flow [2022-11-20 09:27:58,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 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 09:27:58,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:58,578 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] [2022-11-20 09:27:58,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:27:58,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -328099202, now seen corresponding path program 1 times [2022-11-20 09:27:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:58,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100442360] [2022-11-20 09:27:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:58,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:58,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100442360] [2022-11-20 09:27:58,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100442360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974091699] [2022-11-20 09:27:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:58,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:58,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:27:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:27:58,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:58,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974091699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:58,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:58,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 09:27:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202220950] [2022-11-20 09:27:58,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:58,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:27:58,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:27:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:58,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 09:27:58,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 395 flow. Second operand has 12 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 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 09:27:58,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:58,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 09:27:58,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:59,715 INFO L130 PetriNetUnfolder]: 992/2924 cut-off events. [2022-11-20 09:27:59,715 INFO L131 PetriNetUnfolder]: For 6204/6337 co-relation queries the response was YES. [2022-11-20 09:27:59,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8504 conditions, 2924 events. 992/2924 cut-off events. For 6204/6337 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26585 event pairs, 83 based on Foata normal form. 102/2663 useless extension candidates. Maximal degree in co-relation 8321. Up to 442 conditions per place. [2022-11-20 09:27:59,745 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 224 selfloop transitions, 18 changer transitions 0/299 dead transitions. [2022-11-20 09:27:59,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 299 transitions, 2531 flow [2022-11-20 09:27:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:27:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 09:27:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1258 transitions. [2022-11-20 09:27:59,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941919191919192 [2022-11-20 09:27:59,749 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1258 transitions. [2022-11-20 09:27:59,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1258 transitions. [2022-11-20 09:27:59,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:59,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1258 transitions. [2022-11-20 09:27:59,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.88888888888889) internal successors, (1258), 18 states have internal predecessors, (1258), 0 states have call successors, (0), 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 09:27:59,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 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 09:27:59,756 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 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 09:27:59,757 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 395 flow. Second operand 18 states and 1258 transitions. [2022-11-20 09:27:59,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 299 transitions, 2531 flow [2022-11-20 09:27:59,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 299 transitions, 2529 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:59,771 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 499 flow [2022-11-20 09:27:59,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=499, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2022-11-20 09:27:59,775 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2022-11-20 09:27:59,775 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 499 flow [2022-11-20 09:27:59,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.83333333333333) internal successors, (802), 12 states have internal predecessors, (802), 0 states have call successors, (0), 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 09:27:59,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:59,776 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] [2022-11-20 09:27:59,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:59,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:59,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:27:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1581140375, now seen corresponding path program 1 times [2022-11-20 09:27:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473981431] [2022-11-20 09:27:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:00,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473981431] [2022-11-20 09:28:00,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473981431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303845119] [2022-11-20 09:28:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:00,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:00,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:00,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:28:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:00,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:00,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303845119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:00,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:28:00,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:28:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484171578] [2022-11-20 09:28:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:00,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:00,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-11-20 09:28:00,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 499 flow. Second operand has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 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 09:28:00,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:00,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-11-20 09:28:00,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:00,825 INFO L130 PetriNetUnfolder]: 907/2684 cut-off events. [2022-11-20 09:28:00,826 INFO L131 PetriNetUnfolder]: For 6498/6631 co-relation queries the response was YES. [2022-11-20 09:28:00,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8426 conditions, 2684 events. 907/2684 cut-off events. For 6498/6631 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24517 event pairs, 163 based on Foata normal form. 128/2370 useless extension candidates. Maximal degree in co-relation 8240. Up to 805 conditions per place. [2022-11-20 09:28:00,852 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 84 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2022-11-20 09:28:00,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 152 transitions, 1098 flow [2022-11-20 09:28:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:28:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-11-20 09:28:00,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7938311688311688 [2022-11-20 09:28:00,854 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-11-20 09:28:00,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-11-20 09:28:00,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:00,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-11-20 09:28:00,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 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 09:28:00,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 09:28:00,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 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 09:28:00,858 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 499 flow. Second operand 7 states and 489 transitions. [2022-11-20 09:28:00,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 152 transitions, 1098 flow [2022-11-20 09:28:00,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1066 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:00,871 INFO L231 Difference]: Finished difference. Result has 121 places, 97 transitions, 462 flow [2022-11-20 09:28:00,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=121, PETRI_TRANSITIONS=97} [2022-11-20 09:28:00,872 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 51 predicate places. [2022-11-20 09:28:00,872 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 97 transitions, 462 flow [2022-11-20 09:28:00,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 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 09:28:00,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:00,873 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:00,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:01,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:01,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:28:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1040659810, now seen corresponding path program 2 times [2022-11-20 09:28:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:01,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222663294] [2022-11-20 09:28:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:01,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:01,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222663294] [2022-11-20 09:28:01,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222663294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567450093] [2022-11-20 09:28:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:01,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:01,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:01,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:28:01,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:01,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:28:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:01,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:01,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567450093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:01,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:01,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 09:28:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23269407] [2022-11-20 09:28:01,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:28:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:28:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:28:01,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:28:01,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 97 transitions, 462 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:01,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:01,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:28:01,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:02,052 INFO L130 PetriNetUnfolder]: 282/2370 cut-off events. [2022-11-20 09:28:02,052 INFO L131 PetriNetUnfolder]: For 5794/5862 co-relation queries the response was YES. [2022-11-20 09:28:02,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5877 conditions, 2370 events. 282/2370 cut-off events. For 5794/5862 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 20148 event pairs, 20 based on Foata normal form. 263/2467 useless extension candidates. Maximal degree in co-relation 5526. Up to 230 conditions per place. [2022-11-20 09:28:02,080 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 33 selfloop transitions, 46 changer transitions 0/156 dead transitions. [2022-11-20 09:28:02,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 156 transitions, 1024 flow [2022-11-20 09:28:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:28:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 09:28:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 932 transitions. [2022-11-20 09:28:02,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825757575757576 [2022-11-20 09:28:02,083 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 932 transitions. [2022-11-20 09:28:02,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 932 transitions. [2022-11-20 09:28:02,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:02,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 932 transitions. [2022-11-20 09:28:02,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 77.66666666666667) internal successors, (932), 12 states have internal predecessors, (932), 0 states have call successors, (0), 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 09:28:02,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 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 09:28:02,088 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 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 09:28:02,089 INFO L175 Difference]: Start difference. First operand has 121 places, 97 transitions, 462 flow. Second operand 12 states and 932 transitions. [2022-11-20 09:28:02,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 156 transitions, 1024 flow [2022-11-20 09:28:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1010 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:02,108 INFO L231 Difference]: Finished difference. Result has 137 places, 136 transitions, 1044 flow [2022-11-20 09:28:02,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1044, PETRI_PLACES=137, PETRI_TRANSITIONS=136} [2022-11-20 09:28:02,109 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 67 predicate places. [2022-11-20 09:28:02,109 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 136 transitions, 1044 flow [2022-11-20 09:28:02,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:02,110 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:02,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:02,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 09:28:02,317 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:28:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash -653292795, now seen corresponding path program 2 times [2022-11-20 09:28:02,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:02,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049150002] [2022-11-20 09:28:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:02,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049150002] [2022-11-20 09:28:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049150002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533287018] [2022-11-20 09:28:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:02,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:02,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:28:02,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:02,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:28:02,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:28:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533287018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:02,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:02,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-20 09:28:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637332435] [2022-11-20 09:28:02,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:28:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:28:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:28:02,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-20 09:28:02,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 136 transitions, 1044 flow. Second operand has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 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 09:28:02,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:02,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-20 09:28:02,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:05,351 INFO L130 PetriNetUnfolder]: 3525/9775 cut-off events. [2022-11-20 09:28:05,351 INFO L131 PetriNetUnfolder]: For 33003/33013 co-relation queries the response was YES. [2022-11-20 09:28:05,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29728 conditions, 9775 events. 3525/9775 cut-off events. For 33003/33013 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 98399 event pairs, 412 based on Foata normal form. 312/8363 useless extension candidates. Maximal degree in co-relation 28980. Up to 1557 conditions per place. [2022-11-20 09:28:05,476 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 343 selfloop transitions, 23 changer transitions 10/426 dead transitions. [2022-11-20 09:28:05,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 426 transitions, 4804 flow [2022-11-20 09:28:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:28:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 09:28:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1401 transitions. [2022-11-20 09:28:05,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7236570247933884 [2022-11-20 09:28:05,483 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1401 transitions. [2022-11-20 09:28:05,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1401 transitions. [2022-11-20 09:28:05,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:05,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1401 transitions. [2022-11-20 09:28:05,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.68181818181818) internal successors, (1401), 22 states have internal predecessors, (1401), 0 states have call successors, (0), 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 09:28:05,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 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 09:28:05,496 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 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 09:28:05,496 INFO L175 Difference]: Start difference. First operand has 137 places, 136 transitions, 1044 flow. Second operand 22 states and 1401 transitions. [2022-11-20 09:28:05,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 426 transitions, 4804 flow [2022-11-20 09:28:05,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 426 transitions, 4314 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-11-20 09:28:05,583 INFO L231 Difference]: Finished difference. Result has 154 places, 140 transitions, 1001 flow [2022-11-20 09:28:05,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1001, PETRI_PLACES=154, PETRI_TRANSITIONS=140} [2022-11-20 09:28:05,585 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-11-20 09:28:05,586 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 140 transitions, 1001 flow [2022-11-20 09:28:05,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.4375) internal successors, (967), 16 states have internal predecessors, (967), 0 states have call successors, (0), 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 09:28:05,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:05,587 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:05,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:28:05,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:28:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1034121636, now seen corresponding path program 2 times [2022-11-20 09:28:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:05,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086729623] [2022-11-20 09:28:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:06,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:06,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086729623] [2022-11-20 09:28:06,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086729623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:06,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749841124] [2022-11-20 09:28:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:06,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:06,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:06,141 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:06,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:28:06,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:06,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 09:28:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 09:28:06,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749841124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:06,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:06,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-20 09:28:06,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946956818] [2022-11-20 09:28:06,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:06,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:28:06,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:28:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:28:06,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-11-20 09:28:06,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 140 transitions, 1001 flow. Second operand has 16 states, 16 states have (on average 61.4375) internal successors, (983), 16 states have internal predecessors, (983), 0 states have call successors, (0), 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 09:28:06,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:06,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-11-20 09:28:06,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:09,535 INFO L130 PetriNetUnfolder]: 5337/13271 cut-off events. [2022-11-20 09:28:09,535 INFO L131 PetriNetUnfolder]: For 35738/36252 co-relation queries the response was YES. [2022-11-20 09:28:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40987 conditions, 13271 events. 5337/13271 cut-off events. For 35738/36252 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 137655 event pairs, 168 based on Foata normal form. 748/12891 useless extension candidates. Maximal degree in co-relation 40486. Up to 1334 conditions per place. [2022-11-20 09:28:09,632 INFO L137 encePairwiseOnDemand]: 79/88 looper letters, 768 selfloop transitions, 23 changer transitions 0/844 dead transitions. [2022-11-20 09:28:09,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 844 transitions, 9894 flow [2022-11-20 09:28:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:28:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 09:28:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1415 transitions. [2022-11-20 09:28:09,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7308884297520661 [2022-11-20 09:28:09,635 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1415 transitions. [2022-11-20 09:28:09,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1415 transitions. [2022-11-20 09:28:09,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:09,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1415 transitions. [2022-11-20 09:28:09,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.31818181818181) internal successors, (1415), 22 states have internal predecessors, (1415), 0 states have call successors, (0), 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 09:28:09,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 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 09:28:09,643 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 88.0) internal successors, (2024), 23 states have internal predecessors, (2024), 0 states have call successors, (0), 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 09:28:09,644 INFO L175 Difference]: Start difference. First operand has 154 places, 140 transitions, 1001 flow. Second operand 22 states and 1415 transitions. [2022-11-20 09:28:09,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 844 transitions, 9894 flow [2022-11-20 09:28:09,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 844 transitions, 9802 flow, removed 18 selfloop flow, removed 19 redundant places. [2022-11-20 09:28:09,768 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 1006 flow [2022-11-20 09:28:09,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1006, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2022-11-20 09:28:09,769 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 86 predicate places. [2022-11-20 09:28:09,769 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 1006 flow [2022-11-20 09:28:09,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.4375) internal successors, (983), 16 states have internal predecessors, (983), 0 states have call successors, (0), 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 09:28:09,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:09,770 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:09,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:09,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 09:28:09,976 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:28:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 804847074, now seen corresponding path program 3 times [2022-11-20 09:28:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:09,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291426070] [2022-11-20 09:28:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:10,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291426070] [2022-11-20 09:28:10,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291426070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481632089] [2022-11-20 09:28:10,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:10,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:10,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:10,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:28:10,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 09:28:10,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:28:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:10,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:10,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481632089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:10,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:10,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 09:28:10,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965035382] [2022-11-20 09:28:10,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:10,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:28:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:28:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:28:10,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:28:10,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 1006 flow. Second operand has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:10,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:28:10,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:12,606 INFO L130 PetriNetUnfolder]: 939/7882 cut-off events. [2022-11-20 09:28:12,606 INFO L131 PetriNetUnfolder]: For 59983/60213 co-relation queries the response was YES. [2022-11-20 09:28:12,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20562 conditions, 7882 events. 939/7882 cut-off events. For 59983/60213 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 81333 event pairs, 24 based on Foata normal form. 648/8515 useless extension candidates. Maximal degree in co-relation 19916. Up to 838 conditions per place. [2022-11-20 09:28:12,677 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 56 selfloop transitions, 206 changer transitions 1/348 dead transitions. [2022-11-20 09:28:12,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 348 transitions, 3143 flow [2022-11-20 09:28:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:28:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 09:28:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1868 transitions. [2022-11-20 09:28:12,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.884469696969697 [2022-11-20 09:28:12,681 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1868 transitions. [2022-11-20 09:28:12,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1868 transitions. [2022-11-20 09:28:12,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:12,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1868 transitions. [2022-11-20 09:28:12,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 77.83333333333333) internal successors, (1868), 24 states have internal predecessors, (1868), 0 states have call successors, (0), 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 09:28:12,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 88.0) internal successors, (2200), 25 states have internal predecessors, (2200), 0 states have call successors, (0), 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 09:28:12,691 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 88.0) internal successors, (2200), 25 states have internal predecessors, (2200), 0 states have call successors, (0), 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 09:28:12,691 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 1006 flow. Second operand 24 states and 1868 transitions. [2022-11-20 09:28:12,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 348 transitions, 3143 flow [2022-11-20 09:28:12,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 348 transitions, 3091 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-11-20 09:28:12,739 INFO L231 Difference]: Finished difference. Result has 186 places, 304 transitions, 3409 flow [2022-11-20 09:28:12,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3409, PETRI_PLACES=186, PETRI_TRANSITIONS=304} [2022-11-20 09:28:12,740 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 116 predicate places. [2022-11-20 09:28:12,740 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 304 transitions, 3409 flow [2022-11-20 09:28:12,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.16) internal successors, (1829), 25 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:12,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:12,742 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:12,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:12,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:12,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:28:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash 387755746, now seen corresponding path program 4 times [2022-11-20 09:28:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101433953] [2022-11-20 09:28:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:13,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101433953] [2022-11-20 09:28:13,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101433953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:13,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236904547] [2022-11-20 09:28:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:28:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:13,931 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:13,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:28:14,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:28:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:28:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:14,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:15,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236904547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:15,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:15,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 09:28:15,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291741910] [2022-11-20 09:28:15,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:15,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 09:28:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 09:28:15,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 09:28:15,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:28:15,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 304 transitions, 3409 flow. Second operand has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:15,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:28:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:22,234 INFO L130 PetriNetUnfolder]: 2453/20592 cut-off events. [2022-11-20 09:28:22,234 INFO L131 PetriNetUnfolder]: For 679459/680232 co-relation queries the response was YES. [2022-11-20 09:28:22,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58246 conditions, 20592 events. 2453/20592 cut-off events. For 679459/680232 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 232064 event pairs, 24 based on Foata normal form. 1320/21897 useless extension candidates. Maximal degree in co-relation 56888. Up to 2907 conditions per place. [2022-11-20 09:28:22,472 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 104 selfloop transitions, 822 changer transitions 1/1012 dead transitions. [2022-11-20 09:28:22,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1012 transitions, 13514 flow [2022-11-20 09:28:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 09:28:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-20 09:28:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3740 transitions. [2022-11-20 09:28:22,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8854166666666666 [2022-11-20 09:28:22,490 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3740 transitions. [2022-11-20 09:28:22,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3740 transitions. [2022-11-20 09:28:22,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:22,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3740 transitions. [2022-11-20 09:28:22,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 77.91666666666667) internal successors, (3740), 48 states have internal predecessors, (3740), 0 states have call successors, (0), 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 09:28:22,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 88.0) internal successors, (4312), 49 states have internal predecessors, (4312), 0 states have call successors, (0), 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 09:28:22,528 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 88.0) internal successors, (4312), 49 states have internal predecessors, (4312), 0 states have call successors, (0), 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 09:28:22,529 INFO L175 Difference]: Start difference. First operand has 186 places, 304 transitions, 3409 flow. Second operand 48 states and 3740 transitions. [2022-11-20 09:28:22,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1012 transitions, 13514 flow [2022-11-20 09:28:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1012 transitions, 10784 flow, removed 1336 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:22,828 INFO L231 Difference]: Finished difference. Result has 274 places, 920 transitions, 12262 flow [2022-11-20 09:28:22,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12262, PETRI_PLACES=274, PETRI_TRANSITIONS=920} [2022-11-20 09:28:22,829 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 204 predicate places. [2022-11-20 09:28:22,829 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 920 transitions, 12262 flow [2022-11-20 09:28:22,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 73.08163265306122) internal successors, (3581), 49 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:22,832 INFO L209 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:22,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:23,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 09:28:23,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:28:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1740336926, now seen corresponding path program 5 times [2022-11-20 09:28:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:23,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879715678] [2022-11-20 09:28:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:25,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:25,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879715678] [2022-11-20 09:28:25,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879715678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:25,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193380383] [2022-11-20 09:28:25,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:28:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:25,887 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:25,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:28:26,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-20 09:28:26,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 09:28:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:26,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:30,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193380383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:30,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:30,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-20 09:28:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151962961] [2022-11-20 09:28:30,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:30,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 09:28:30,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 09:28:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-20 09:28:30,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:28:30,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 920 transitions, 12262 flow. Second operand has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:30,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:30,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:28:30,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:57,915 INFO L130 PetriNetUnfolder]: 6679/55057 cut-off events. [2022-11-20 09:28:57,915 INFO L131 PetriNetUnfolder]: For 6150523/6152165 co-relation queries the response was YES. [2022-11-20 09:28:58,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158830 conditions, 55057 events. 6679/55057 cut-off events. For 6150523/6152165 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 663482 event pairs, 24 based on Foata normal form. 2685/57726 useless extension candidates. Maximal degree in co-relation 156067. Up to 7507 conditions per place. [2022-11-20 09:28:58,934 INFO L137 encePairwiseOnDemand]: 83/88 looper letters, 200 selfloop transitions, 3214 changer transitions 1/3500 dead transitions. [2022-11-20 09:28:58,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 3500 transitions, 51235 flow [2022-11-20 09:28:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 09:28:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-20 09:28:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 7484 transitions. [2022-11-20 09:28:58,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8858901515151515 [2022-11-20 09:28:58,946 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 7484 transitions. [2022-11-20 09:28:58,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 7484 transitions. [2022-11-20 09:28:58,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:58,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 7484 transitions. [2022-11-20 09:28:58,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 77.95833333333333) internal successors, (7484), 96 states have internal predecessors, (7484), 0 states have call successors, (0), 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 09:28:58,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 88.0) internal successors, (8536), 97 states have internal predecessors, (8536), 0 states have call successors, (0), 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 09:28:58,975 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 88.0) internal successors, (8536), 97 states have internal predecessors, (8536), 0 states have call successors, (0), 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 09:28:58,975 INFO L175 Difference]: Start difference. First operand has 274 places, 920 transitions, 12262 flow. Second operand 96 states and 7484 transitions. [2022-11-20 09:28:58,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 3500 transitions, 51235 flow [2022-11-20 09:29:01,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 3500 transitions, 40313 flow, removed 5296 selfloop flow, removed 11 redundant places. [2022-11-20 09:29:01,321 INFO L231 Difference]: Finished difference. Result has 452 places, 3312 transitions, 46431 flow [2022-11-20 09:29:01,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11226, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=46431, PETRI_PLACES=452, PETRI_TRANSITIONS=3312} [2022-11-20 09:29:01,322 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 382 predicate places. [2022-11-20 09:29:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 3312 transitions, 46431 flow [2022-11-20 09:29:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 73.04123711340206) internal successors, (7085), 97 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:01,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:29:01,325 INFO L209 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:01,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:01,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:01,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-11-20 09:29:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1159091426, now seen corresponding path program 6 times [2022-11-20 09:29:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:01,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87310214] [2022-11-20 09:29:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:11,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87310214] [2022-11-20 09:29:11,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87310214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:11,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531150959] [2022-11-20 09:29:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:29:11,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:11,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:11,455 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:11,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b683aa85-f92d-4152-b32d-8a41bdf02c65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:29:12,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-20 09:29:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 09:29:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:13,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:24,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531150959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:24,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:24,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-20 09:29:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950464698] [2022-11-20 09:29:24,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-20 09:29:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:24,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-20 09:29:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-20 09:29:24,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-11-20 09:29:24,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 3312 transitions, 46431 flow. Second operand has 193 states, 193 states have (on average 73.02072538860104) internal successors, (14093), 193 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:24,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:29:24,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-11-20 09:29:24,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand