./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/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_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/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_b89621f9-7ded-49e3-82c0-3367e651bdde/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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- 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 10:40:57,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:40:57,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:40:57,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:40:57,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:40:57,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:40:57,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:40:57,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:40:57,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:40:57,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:40:57,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:40:57,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:40:57,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:40:57,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:40:57,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:40:57,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:40:57,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:40:57,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:40:57,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:40:57,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:40:57,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:40:57,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:40:57,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:40:57,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:40:57,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:40:57,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:40:57,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:40:57,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:40:57,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:40:57,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:40:57,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:40:57,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:40:57,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:40:57,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:40:57,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:40:57,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:40:57,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:40:57,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:40:57,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:40:57,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:40:57,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:40:57,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 10:40:57,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:40:57,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:40:57,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:40:57,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:40:57,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:40:57,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:40:57,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:40:57,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:40:57,390 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:40:57,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:40:57,391 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:40:57,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:40:57,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:40:57,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:40:57,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:40:57,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:40:57,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:40:57,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:40:57,393 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 10:40:57,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:40:57,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:40:57,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:40:57,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:40:57,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:40:57,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:40:57,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:40:57,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:40:57,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:40:57,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:40:57,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:40:57,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:40:57,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:40:57,396 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:40:57,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:40:57,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:40:57,396 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_b89621f9-7ded-49e3-82c0-3367e651bdde/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-11-20 10:40:57,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:40:57,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:40:57,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:40:57,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:40:57,677 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:40:57,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-20 10:41:00,764 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:41:01,018 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:41:01,020 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-11-20 10:41:01,030 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/data/806cdc819/0c31df9c59a14241889cbf1b5e398969/FLAG3caa518f6 [2022-11-20 10:41:01,044 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/data/806cdc819/0c31df9c59a14241889cbf1b5e398969 [2022-11-20 10:41:01,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:41:01,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:41:01,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:41:01,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:41:01,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:41:01,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@867be92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01, skipping insertion in model container [2022-11-20 10:41:01,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:41:01,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:41:01,251 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_b89621f9-7ded-49e3-82c0-3367e651bdde/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-20 10:41:01,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:41:01,267 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:41:01,291 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_b89621f9-7ded-49e3-82c0-3367e651bdde/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-11-20 10:41:01,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:41:01,310 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:41:01,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01 WrapperNode [2022-11-20 10:41:01,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:41:01,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:41:01,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:41:01,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:41:01,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,357 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 175 [2022-11-20 10:41:01,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:41:01,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:41:01,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:41:01,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:41:01,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:41:01,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:41:01,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:41:01,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:41:01,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (1/1) ... [2022-11-20 10:41:01,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:41:01,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:01,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:41:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:41:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:41:01,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:41:01,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:41:01,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:41:01,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:41:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:41:01,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:41:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:41:01,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:41:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:41:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:41:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:41:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:41:01,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:41:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:41:01,472 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 10:41:01,583 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:41:01,585 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:41:02,096 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:41:02,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:41:02,268 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:41:02,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:41:02 BoogieIcfgContainer [2022-11-20 10:41:02,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:41:02,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:41:02,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:41:02,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:41:02,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:41:01" (1/3) ... [2022-11-20 10:41:02,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e4a7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:41:02, skipping insertion in model container [2022-11-20 10:41:02,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:41:01" (2/3) ... [2022-11-20 10:41:02,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e4a7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:41:02, skipping insertion in model container [2022-11-20 10:41:02,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:41:02" (3/3) ... [2022-11-20 10:41:02,286 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-11-20 10:41:02,296 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:41:02,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:41:02,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-20 10:41:02,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:41:02,423 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:41:02,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 162 transitions, 340 flow [2022-11-20 10:41:02,545 INFO L130 PetriNetUnfolder]: 11/160 cut-off events. [2022-11-20 10:41:02,545 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:41:02,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 11/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 146 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-11-20 10:41:02,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 162 transitions, 340 flow [2022-11-20 10:41:02,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 141 transitions, 291 flow [2022-11-20 10:41:02,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:41:02,577 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;@9c5c53e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:41:02,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-20 10:41:02,598 INFO L130 PetriNetUnfolder]: 3/72 cut-off events. [2022-11-20 10:41:02,598 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:41:02,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:02,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:02,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:02,606 INFO L85 PathProgramCache]: Analyzing trace with hash -932682411, now seen corresponding path program 1 times [2022-11-20 10:41:02,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:02,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082092600] [2022-11-20 10:41:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:02,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082092600] [2022-11-20 10:41:03,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082092600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:03,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:41:03,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:41:03,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333359545] [2022-11-20 10:41:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:03,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:41:03,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:41:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:41:03,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 162 [2022-11-20 10:41:03,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 141 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 10:41:03,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:03,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 162 [2022-11-20 10:41:03,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:03,494 INFO L130 PetriNetUnfolder]: 57/368 cut-off events. [2022-11-20 10:41:03,494 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 10:41:03,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 368 events. 57/368 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1405 event pairs, 28 based on Foata normal form. 30/304 useless extension candidates. Maximal degree in co-relation 192. Up to 62 conditions per place. [2022-11-20 10:41:03,507 INFO L137 encePairwiseOnDemand]: 146/162 looper letters, 34 selfloop transitions, 4 changer transitions 3/148 dead transitions. [2022-11-20 10:41:03,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 148 transitions, 390 flow [2022-11-20 10:41:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:41:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:41:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2022-11-20 10:41:03,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8617283950617284 [2022-11-20 10:41:03,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2022-11-20 10:41:03,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2022-11-20 10:41:03,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:03,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2022-11-20 10:41:03,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 10:41:03,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 10:41:03,554 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 10:41:03,556 INFO L175 Difference]: Start difference. First operand has 138 places, 141 transitions, 291 flow. Second operand 5 states and 698 transitions. [2022-11-20 10:41:03,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 148 transitions, 390 flow [2022-11-20 10:41:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 148 transitions, 380 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:41:03,565 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 290 flow [2022-11-20 10:41:03,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2022-11-20 10:41:03,571 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 1 predicate places. [2022-11-20 10:41:03,571 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 290 flow [2022-11-20 10:41:03,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 10:41:03,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:03,573 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:03,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:41:03,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1791117521, now seen corresponding path program 1 times [2022-11-20 10:41:03,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:03,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799230084] [2022-11-20 10:41:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:03,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799230084] [2022-11-20 10:41:03,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799230084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914326452] [2022-11-20 10:41:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:03,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:41:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:03,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:41:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:04,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:04,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914326452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:04,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:04,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 10:41:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567325050] [2022-11-20 10:41:04,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:04,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:41:04,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:41:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:41:04,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 162 [2022-11-20 10:41:04,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 131 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 10:41:04,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:04,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 162 [2022-11-20 10:41:04,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:04,724 INFO L130 PetriNetUnfolder]: 141/825 cut-off events. [2022-11-20 10:41:04,724 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-20 10:41:04,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 825 events. 141/825 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4415 event pairs, 70 based on Foata normal form. 3/608 useless extension candidates. Maximal degree in co-relation 908. Up to 57 conditions per place. [2022-11-20 10:41:04,731 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 73 selfloop transitions, 18 changer transitions 0/198 dead transitions. [2022-11-20 10:41:04,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 198 transitions, 644 flow [2022-11-20 10:41:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:41:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:41:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2398 transitions. [2022-11-20 10:41:04,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8223593964334706 [2022-11-20 10:41:04,738 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2398 transitions. [2022-11-20 10:41:04,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2398 transitions. [2022-11-20 10:41:04,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:04,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2398 transitions. [2022-11-20 10:41:04,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 133.22222222222223) internal successors, (2398), 18 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states 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 10:41:04,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 162.0) internal successors, (3078), 19 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 10:41:04,756 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 162.0) internal successors, (3078), 19 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 10:41:04,756 INFO L175 Difference]: Start difference. First operand has 139 places, 131 transitions, 290 flow. Second operand 18 states and 2398 transitions. [2022-11-20 10:41:04,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 198 transitions, 644 flow [2022-11-20 10:41:04,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 198 transitions, 642 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:41:04,762 INFO L231 Difference]: Finished difference. Result has 156 places, 143 transitions, 394 flow [2022-11-20 10:41:04,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=394, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-11-20 10:41:04,763 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 18 predicate places. [2022-11-20 10:41:04,763 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 394 flow [2022-11-20 10:41:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.66666666666666) internal successors, (1568), 12 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 10:41:04,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:04,765 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:04,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:04,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 10:41:04,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:04,972 INFO L85 PathProgramCache]: Analyzing trace with hash 309932108, now seen corresponding path program 1 times [2022-11-20 10:41:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148389731] [2022-11-20 10:41:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:05,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148389731] [2022-11-20 10:41:05,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148389731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167162766] [2022-11-20 10:41:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:05,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:05,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:05,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:05,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:41:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:41:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:05,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:05,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167162766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:05,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:41:05,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 10:41:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764307642] [2022-11-20 10:41:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:41:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:41:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:41:05,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 162 [2022-11-20 10:41:05,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 143 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 10:41:05,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:05,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 162 [2022-11-20 10:41:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:05,583 INFO L130 PetriNetUnfolder]: 141/821 cut-off events. [2022-11-20 10:41:05,583 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-20 10:41:05,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 821 events. 141/821 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4380 event pairs, 70 based on Foata normal form. 4/605 useless extension candidates. Maximal degree in co-relation 960. Up to 212 conditions per place. [2022-11-20 10:41:05,590 INFO L137 encePairwiseOnDemand]: 157/162 looper letters, 35 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2022-11-20 10:41:05,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 153 transitions, 493 flow [2022-11-20 10:41:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:41:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:41:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 934 transitions. [2022-11-20 10:41:05,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8236331569664903 [2022-11-20 10:41:05,594 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 934 transitions. [2022-11-20 10:41:05,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 934 transitions. [2022-11-20 10:41:05,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:05,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 934 transitions. [2022-11-20 10:41:05,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.42857142857142) internal successors, (934), 7 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 10:41:05,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 10:41:05,602 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 10:41:05,602 INFO L175 Difference]: Start difference. First operand has 156 places, 143 transitions, 394 flow. Second operand 7 states and 934 transitions. [2022-11-20 10:41:05,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 153 transitions, 493 flow [2022-11-20 10:41:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 153 transitions, 461 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 10:41:05,608 INFO L231 Difference]: Finished difference. Result has 152 places, 139 transitions, 357 flow [2022-11-20 10:41:05,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=357, PETRI_PLACES=152, PETRI_TRANSITIONS=139} [2022-11-20 10:41:05,610 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 14 predicate places. [2022-11-20 10:41:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 139 transitions, 357 flow [2022-11-20 10:41:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 10:41:05,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:05,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:05,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:05,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:05,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1466865984, now seen corresponding path program 1 times [2022-11-20 10:41:05,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:05,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399126286] [2022-11-20 10:41:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:05,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:05,993 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 10:41:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399126286] [2022-11-20 10:41:05,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399126286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:05,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:41:05,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:41:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317130058] [2022-11-20 10:41:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:41:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:41:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:41:05,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 162 [2022-11-20 10:41:05,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 139 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 10:41:05,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:05,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 162 [2022-11-20 10:41:05,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:06,234 INFO L130 PetriNetUnfolder]: 113/708 cut-off events. [2022-11-20 10:41:06,235 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-20 10:41:06,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 708 events. 113/708 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3514 event pairs, 56 based on Foata normal form. 5/535 useless extension candidates. Maximal degree in co-relation 900. Up to 221 conditions per place. [2022-11-20 10:41:06,240 INFO L137 encePairwiseOnDemand]: 149/162 looper letters, 27 selfloop transitions, 6 changer transitions 3/144 dead transitions. [2022-11-20 10:41:06,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 144 transitions, 442 flow [2022-11-20 10:41:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:41:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:41:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 918 transitions. [2022-11-20 10:41:06,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-11-20 10:41:06,244 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 918 transitions. [2022-11-20 10:41:06,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 918 transitions. [2022-11-20 10:41:06,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:06,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 918 transitions. [2022-11-20 10:41:06,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.14285714285714) internal successors, (918), 7 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:06,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 10:41:06,251 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 10:41:06,251 INFO L175 Difference]: Start difference. First operand has 152 places, 139 transitions, 357 flow. Second operand 7 states and 918 transitions. [2022-11-20 10:41:06,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 144 transitions, 442 flow [2022-11-20 10:41:06,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 144 transitions, 428 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:41:06,258 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 371 flow [2022-11-20 10:41:06,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2022-11-20 10:41:06,261 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 17 predicate places. [2022-11-20 10:41:06,261 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 371 flow [2022-11-20 10:41:06,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 0 states have call successors, (0), 0 states 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 10:41:06,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:06,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:06,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:41:06,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:06,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1348639142, now seen corresponding path program 1 times [2022-11-20 10:41:06,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:06,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632658771] [2022-11-20 10:41:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:06,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632658771] [2022-11-20 10:41:06,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632658771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476239553] [2022-11-20 10:41:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:06,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:06,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:06,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:06,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:41:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:06,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:41:06,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:06,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:06,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476239553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:06,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:41:06,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 10:41:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900446835] [2022-11-20 10:41:06,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:06,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:41:06,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:41:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:41:06,771 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 162 [2022-11-20 10:41:06,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 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 10:41:06,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:06,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 162 [2022-11-20 10:41:06,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:06,876 INFO L130 PetriNetUnfolder]: 45/501 cut-off events. [2022-11-20 10:41:06,876 INFO L131 PetriNetUnfolder]: For 79/103 co-relation queries the response was YES. [2022-11-20 10:41:06,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 501 events. 45/501 cut-off events. For 79/103 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2154 event pairs, 20 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 633. Up to 84 conditions per place. [2022-11-20 10:41:06,880 INFO L137 encePairwiseOnDemand]: 156/162 looper letters, 9 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2022-11-20 10:41:06,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 136 transitions, 383 flow [2022-11-20 10:41:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:41:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:41:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 551 transitions. [2022-11-20 10:41:06,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8503086419753086 [2022-11-20 10:41:06,882 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 551 transitions. [2022-11-20 10:41:06,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 551 transitions. [2022-11-20 10:41:06,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:06,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 551 transitions. [2022-11-20 10:41:06,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 10:41:06,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 10:41:06,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 10:41:06,887 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 371 flow. Second operand 4 states and 551 transitions. [2022-11-20 10:41:06,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 136 transitions, 383 flow [2022-11-20 10:41:06,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 136 transitions, 371 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:41:06,890 INFO L231 Difference]: Finished difference. Result has 149 places, 136 transitions, 353 flow [2022-11-20 10:41:06,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=353, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2022-11-20 10:41:06,892 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 11 predicate places. [2022-11-20 10:41:06,892 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 353 flow [2022-11-20 10:41:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 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 10:41:06,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:06,893 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:06,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 10:41:07,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:07,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:07,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2108780891, now seen corresponding path program 1 times [2022-11-20 10:41:07,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:07,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603903599] [2022-11-20 10:41:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:07,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603903599] [2022-11-20 10:41:07,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603903599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:07,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:41:07,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:41:07,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416937299] [2022-11-20 10:41:07,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:07,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:41:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:41:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:41:07,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 162 [2022-11-20 10:41:07,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:07,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:07,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 162 [2022-11-20 10:41:07,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:07,436 INFO L130 PetriNetUnfolder]: 237/977 cut-off events. [2022-11-20 10:41:07,436 INFO L131 PetriNetUnfolder]: For 166/286 co-relation queries the response was YES. [2022-11-20 10:41:07,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 977 events. 237/977 cut-off events. For 166/286 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6082 event pairs, 80 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 1841. Up to 305 conditions per place. [2022-11-20 10:41:07,444 INFO L137 encePairwiseOnDemand]: 156/162 looper letters, 28 selfloop transitions, 4 changer transitions 0/152 dead transitions. [2022-11-20 10:41:07,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 152 transitions, 466 flow [2022-11-20 10:41:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:41:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:41:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 684 transitions. [2022-11-20 10:41:07,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2022-11-20 10:41:07,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 684 transitions. [2022-11-20 10:41:07,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 684 transitions. [2022-11-20 10:41:07,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:07,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 684 transitions. [2022-11-20 10:41:07,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 10:41:07,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 10:41:07,456 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 10:41:07,456 INFO L175 Difference]: Start difference. First operand has 149 places, 136 transitions, 353 flow. Second operand 5 states and 684 transitions. [2022-11-20 10:41:07,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 152 transitions, 466 flow [2022-11-20 10:41:07,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 152 transitions, 460 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:41:07,460 INFO L231 Difference]: Finished difference. Result has 153 places, 139 transitions, 377 flow [2022-11-20 10:41:07,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=153, PETRI_TRANSITIONS=139} [2022-11-20 10:41:07,463 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 15 predicate places. [2022-11-20 10:41:07,464 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 139 transitions, 377 flow [2022-11-20 10:41:07,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:07,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:07,465 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:41:07,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1709936893, now seen corresponding path program 1 times [2022-11-20 10:41:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12759420] [2022-11-20 10:41:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:07,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:07,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12759420] [2022-11-20 10:41:07,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12759420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:07,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:41:07,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:41:07,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547237912] [2022-11-20 10:41:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:41:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:41:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:41:07,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 162 [2022-11-20 10:41:07,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 139 transitions, 377 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 10:41:07,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:07,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 162 [2022-11-20 10:41:07,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:07,813 INFO L130 PetriNetUnfolder]: 65/801 cut-off events. [2022-11-20 10:41:07,813 INFO L131 PetriNetUnfolder]: For 138/178 co-relation queries the response was YES. [2022-11-20 10:41:07,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 801 events. 65/801 cut-off events. For 138/178 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4656 event pairs, 16 based on Foata normal form. 4/705 useless extension candidates. Maximal degree in co-relation 1116. Up to 124 conditions per place. [2022-11-20 10:41:07,818 INFO L137 encePairwiseOnDemand]: 158/162 looper letters, 10 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2022-11-20 10:41:07,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 142 transitions, 415 flow [2022-11-20 10:41:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:41:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:41:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2022-11-20 10:41:07,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8683127572016461 [2022-11-20 10:41:07,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2022-11-20 10:41:07,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2022-11-20 10:41:07,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:07,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2022-11-20 10:41:07,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 10:41:07,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 10:41:07,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 10:41:07,827 INFO L175 Difference]: Start difference. First operand has 153 places, 139 transitions, 377 flow. Second operand 3 states and 422 transitions. [2022-11-20 10:41:07,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 142 transitions, 415 flow [2022-11-20 10:41:07,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 142 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:41:07,831 INFO L231 Difference]: Finished difference. Result has 155 places, 141 transitions, 398 flow [2022-11-20 10:41:07,832 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=155, PETRI_TRANSITIONS=141} [2022-11-20 10:41:07,832 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 17 predicate places. [2022-11-20 10:41:07,833 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 141 transitions, 398 flow [2022-11-20 10:41:07,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 10:41:07,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:07,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:07,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:41:07,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1710692693, now seen corresponding path program 1 times [2022-11-20 10:41:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:07,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438046420] [2022-11-20 10:41:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:09,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438046420] [2022-11-20 10:41:09,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438046420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944316383] [2022-11-20 10:41:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:09,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:09,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:09,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:41:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:41:09,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:10,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:41:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:11,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:11,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:12,152 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:12,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:41:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:13,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:13,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 10:41:13,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:13,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 146 [2022-11-20 10:41:13,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 118 [2022-11-20 10:41:13,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 94 [2022-11-20 10:41:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:15,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944316383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:15,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:15,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-11-20 10:41:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589358093] [2022-11-20 10:41:15,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:15,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 10:41:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 10:41:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3767, Unknown=5, NotChecked=0, Total=4032 [2022-11-20 10:41:15,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 162 [2022-11-20 10:41:15,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 141 transitions, 398 flow. Second operand has 64 states, 64 states have (on average 80.953125) internal successors, (5181), 64 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states 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 10:41:15,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:15,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 162 [2022-11-20 10:41:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:18,912 INFO L130 PetriNetUnfolder]: 719/2409 cut-off events. [2022-11-20 10:41:18,913 INFO L131 PetriNetUnfolder]: For 1139/1331 co-relation queries the response was YES. [2022-11-20 10:41:18,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4976 conditions, 2409 events. 719/2409 cut-off events. For 1139/1331 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 18992 event pairs, 384 based on Foata normal form. 0/2082 useless extension candidates. Maximal degree in co-relation 4849. Up to 1189 conditions per place. [2022-11-20 10:41:18,929 INFO L137 encePairwiseOnDemand]: 128/162 looper letters, 76 selfloop transitions, 51 changer transitions 0/193 dead transitions. [2022-11-20 10:41:18,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 193 transitions, 816 flow [2022-11-20 10:41:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:41:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 10:41:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2566 transitions. [2022-11-20 10:41:18,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5109518120270808 [2022-11-20 10:41:18,938 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2566 transitions. [2022-11-20 10:41:18,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2566 transitions. [2022-11-20 10:41:18,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:18,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2566 transitions. [2022-11-20 10:41:18,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 82.7741935483871) internal successors, (2566), 31 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states 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 10:41:18,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 162.0) internal successors, (5184), 32 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 10:41:18,960 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 162.0) internal successors, (5184), 32 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 10:41:18,960 INFO L175 Difference]: Start difference. First operand has 155 places, 141 transitions, 398 flow. Second operand 31 states and 2566 transitions. [2022-11-20 10:41:18,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 193 transitions, 816 flow [2022-11-20 10:41:18,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 193 transitions, 775 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-11-20 10:41:18,968 INFO L231 Difference]: Finished difference. Result has 196 places, 178 transitions, 694 flow [2022-11-20 10:41:18,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=694, PETRI_PLACES=196, PETRI_TRANSITIONS=178} [2022-11-20 10:41:18,971 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 58 predicate places. [2022-11-20 10:41:18,972 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 178 transitions, 694 flow [2022-11-20 10:41:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 80.953125) internal successors, (5181), 64 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states 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 10:41:18,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:18,974 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:18,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:19,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:41:19,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash 491376819, now seen corresponding path program 2 times [2022-11-20 10:41:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:19,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864877542] [2022-11-20 10:41:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:20,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:20,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864877542] [2022-11-20 10:41:20,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864877542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033968842] [2022-11-20 10:41:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:41:20,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:20,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:20,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:41:20,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:41:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:41:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:20,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:21,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 10:41:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:21,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:21,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033968842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:21,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:41:21,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 29 [2022-11-20 10:41:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138002858] [2022-11-20 10:41:21,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:21,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:41:21,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:41:21,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:41:21,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 162 [2022-11-20 10:41:21,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 178 transitions, 694 flow. Second operand has 13 states, 13 states have (on average 104.38461538461539) internal successors, (1357), 13 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states 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 10:41:21,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:21,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 162 [2022-11-20 10:41:21,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:22,196 INFO L130 PetriNetUnfolder]: 835/2533 cut-off events. [2022-11-20 10:41:22,197 INFO L131 PetriNetUnfolder]: For 1764/1788 co-relation queries the response was YES. [2022-11-20 10:41:22,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6363 conditions, 2533 events. 835/2533 cut-off events. For 1764/1788 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 20399 event pairs, 350 based on Foata normal form. 22/2429 useless extension candidates. Maximal degree in co-relation 6221. Up to 1250 conditions per place. [2022-11-20 10:41:22,217 INFO L137 encePairwiseOnDemand]: 148/162 looper letters, 78 selfloop transitions, 28 changer transitions 1/209 dead transitions. [2022-11-20 10:41:22,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 209 transitions, 1036 flow [2022-11-20 10:41:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:41:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 10:41:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1499 transitions. [2022-11-20 10:41:22,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6609347442680776 [2022-11-20 10:41:22,222 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1499 transitions. [2022-11-20 10:41:22,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1499 transitions. [2022-11-20 10:41:22,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:22,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1499 transitions. [2022-11-20 10:41:22,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.07142857142857) internal successors, (1499), 14 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states 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 10:41:22,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 162.0) internal successors, (2430), 15 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states 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 10:41:22,232 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 162.0) internal successors, (2430), 15 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states 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 10:41:22,233 INFO L175 Difference]: Start difference. First operand has 196 places, 178 transitions, 694 flow. Second operand 14 states and 1499 transitions. [2022-11-20 10:41:22,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 209 transitions, 1036 flow [2022-11-20 10:41:22,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 209 transitions, 1000 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-11-20 10:41:22,246 INFO L231 Difference]: Finished difference. Result has 199 places, 182 transitions, 756 flow [2022-11-20 10:41:22,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=199, PETRI_TRANSITIONS=182} [2022-11-20 10:41:22,248 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 61 predicate places. [2022-11-20 10:41:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 182 transitions, 756 flow [2022-11-20 10:41:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.38461538461539) internal successors, (1357), 13 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states 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 10:41:22,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:22,249 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:22,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:22,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1904247443, now seen corresponding path program 3 times [2022-11-20 10:41:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:22,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093251822] [2022-11-20 10:41:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:22,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:23,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093251822] [2022-11-20 10:41:23,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093251822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:23,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950833919] [2022-11-20 10:41:23,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:41:23,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:23,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:23,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:41:23,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:41:23,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:41:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:23,841 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:23,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:41:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:23,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:23,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950833919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:23,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:41:23,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-20 10:41:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896824394] [2022-11-20 10:41:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:41:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:41:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:41:23,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:41:23,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 182 transitions, 756 flow. Second operand has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:41:23,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:23,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:41:23,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:24,584 INFO L130 PetriNetUnfolder]: 943/2853 cut-off events. [2022-11-20 10:41:24,584 INFO L131 PetriNetUnfolder]: For 2676/2700 co-relation queries the response was YES. [2022-11-20 10:41:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 2853 events. 943/2853 cut-off events. For 2676/2700 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 23733 event pairs, 581 based on Foata normal form. 19/2697 useless extension candidates. Maximal degree in co-relation 7270. Up to 1633 conditions per place. [2022-11-20 10:41:24,609 INFO L137 encePairwiseOnDemand]: 156/162 looper letters, 73 selfloop transitions, 16 changer transitions 1/206 dead transitions. [2022-11-20 10:41:24,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 206 transitions, 1045 flow [2022-11-20 10:41:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:41:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:41:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 750 transitions. [2022-11-20 10:41:24,612 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7716049382716049 [2022-11-20 10:41:24,613 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 750 transitions. [2022-11-20 10:41:24,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 750 transitions. [2022-11-20 10:41:24,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:24,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 750 transitions. [2022-11-20 10:41:24,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 10:41:24,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:41:24,635 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:41:24,635 INFO L175 Difference]: Start difference. First operand has 199 places, 182 transitions, 756 flow. Second operand 6 states and 750 transitions. [2022-11-20 10:41:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 206 transitions, 1045 flow [2022-11-20 10:41:24,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 206 transitions, 1000 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-11-20 10:41:24,647 INFO L231 Difference]: Finished difference. Result has 196 places, 186 transitions, 794 flow [2022-11-20 10:41:24,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=794, PETRI_PLACES=196, PETRI_TRANSITIONS=186} [2022-11-20 10:41:24,649 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 58 predicate places. [2022-11-20 10:41:24,649 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 186 transitions, 794 flow [2022-11-20 10:41:24,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:41:24,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:24,650 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:24,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:41:24,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash 585221969, now seen corresponding path program 1 times [2022-11-20 10:41:24,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:24,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024416075] [2022-11-20 10:41:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:26,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:26,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024416075] [2022-11-20 10:41:26,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024416075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:26,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48061248] [2022-11-20 10:41:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:26,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:26,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:41:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:41:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:27,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:41:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:28,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:28,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:28,548 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:28,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:41:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:28,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:28,800 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_203 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_203) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 2147483648)) is different from false [2022-11-20 10:41:29,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:29,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 10:41:29,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:29,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-11-20 10:41:29,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-20 10:41:29,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-20 10:41:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:31,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48061248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:31,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:31,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2022-11-20 10:41:31,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98959433] [2022-11-20 10:41:31,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:31,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 10:41:31,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 10:41:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3811, Unknown=4, NotChecked=124, Total=4160 [2022-11-20 10:41:31,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 162 [2022-11-20 10:41:31,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 186 transitions, 794 flow. Second operand has 65 states, 65 states have (on average 64.4) internal successors, (4186), 65 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states 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 10:41:31,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:31,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 162 [2022-11-20 10:41:31,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:36,359 INFO L130 PetriNetUnfolder]: 1391/4511 cut-off events. [2022-11-20 10:41:36,360 INFO L131 PetriNetUnfolder]: For 4482/5184 co-relation queries the response was YES. [2022-11-20 10:41:36,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 4511 events. 1391/4511 cut-off events. For 4482/5184 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 40364 event pairs, 280 based on Foata normal form. 95/4265 useless extension candidates. Maximal degree in co-relation 11311. Up to 1160 conditions per place. [2022-11-20 10:41:36,412 INFO L137 encePairwiseOnDemand]: 126/162 looper letters, 129 selfloop transitions, 81 changer transitions 0/266 dead transitions. [2022-11-20 10:41:36,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 266 transitions, 1604 flow [2022-11-20 10:41:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:41:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 10:41:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2454 transitions. [2022-11-20 10:41:36,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4094094094094094 [2022-11-20 10:41:36,421 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2454 transitions. [2022-11-20 10:41:36,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2454 transitions. [2022-11-20 10:41:36,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:36,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2454 transitions. [2022-11-20 10:41:36,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 66.32432432432432) internal successors, (2454), 37 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states 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 10:41:36,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 162.0) internal successors, (6156), 38 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states 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 10:41:36,444 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 162.0) internal successors, (6156), 38 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states 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 10:41:36,444 INFO L175 Difference]: Start difference. First operand has 196 places, 186 transitions, 794 flow. Second operand 37 states and 2454 transitions. [2022-11-20 10:41:36,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 266 transitions, 1604 flow [2022-11-20 10:41:36,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 266 transitions, 1582 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 10:41:36,459 INFO L231 Difference]: Finished difference. Result has 236 places, 227 transitions, 1297 flow [2022-11-20 10:41:36,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1297, PETRI_PLACES=236, PETRI_TRANSITIONS=227} [2022-11-20 10:41:36,460 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 98 predicate places. [2022-11-20 10:41:36,460 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 227 transitions, 1297 flow [2022-11-20 10:41:36,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 64.4) internal successors, (4186), 65 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states 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 10:41:36,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:36,462 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:36,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1503177139, now seen corresponding path program 2 times [2022-11-20 10:41:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:36,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42140645] [2022-11-20 10:41:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:37,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:37,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42140645] [2022-11-20 10:41:37,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42140645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:37,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361411199] [2022-11-20 10:41:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:41:37,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:37,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:37,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:41:37,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:41:37,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:41:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:37,826 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:37,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:41:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:37,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:37,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361411199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:37,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:41:37,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-20 10:41:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016015201] [2022-11-20 10:41:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:37,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:41:37,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:41:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:41:37,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:41:37,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 227 transitions, 1297 flow. Second operand has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:41:37,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:37,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:41:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:39,204 INFO L130 PetriNetUnfolder]: 2048/5748 cut-off events. [2022-11-20 10:41:39,204 INFO L131 PetriNetUnfolder]: For 15690/19917 co-relation queries the response was YES. [2022-11-20 10:41:39,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18078 conditions, 5748 events. 2048/5748 cut-off events. For 15690/19917 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 51082 event pairs, 631 based on Foata normal form. 189/5341 useless extension candidates. Maximal degree in co-relation 17924. Up to 3024 conditions per place. [2022-11-20 10:41:39,262 INFO L137 encePairwiseOnDemand]: 152/162 looper letters, 123 selfloop transitions, 30 changer transitions 0/270 dead transitions. [2022-11-20 10:41:39,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 270 transitions, 1926 flow [2022-11-20 10:41:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:41:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:41:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 754 transitions. [2022-11-20 10:41:39,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7757201646090535 [2022-11-20 10:41:39,264 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 754 transitions. [2022-11-20 10:41:39,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 754 transitions. [2022-11-20 10:41:39,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:39,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 754 transitions. [2022-11-20 10:41:39,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states 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 10:41:39,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:41:39,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:41:39,269 INFO L175 Difference]: Start difference. First operand has 236 places, 227 transitions, 1297 flow. Second operand 6 states and 754 transitions. [2022-11-20 10:41:39,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 270 transitions, 1926 flow [2022-11-20 10:41:39,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 270 transitions, 1743 flow, removed 65 selfloop flow, removed 24 redundant places. [2022-11-20 10:41:39,316 INFO L231 Difference]: Finished difference. Result has 220 places, 243 transitions, 1382 flow [2022-11-20 10:41:39,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1382, PETRI_PLACES=220, PETRI_TRANSITIONS=243} [2022-11-20 10:41:39,317 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 82 predicate places. [2022-11-20 10:41:39,317 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 243 transitions, 1382 flow [2022-11-20 10:41:39,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:41:39,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:39,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:39,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:39,524 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1677988437, now seen corresponding path program 3 times [2022-11-20 10:41:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288344675] [2022-11-20 10:41:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:40,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:40,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288344675] [2022-11-20 10:41:40,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288344675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:40,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706873691] [2022-11-20 10:41:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:41:40,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:40,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:40,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:41:40,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:41:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:41:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:40,726 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:40,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:41:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:40,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:40,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706873691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:40,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:41:40,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-20 10:41:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507950982] [2022-11-20 10:41:40,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:41:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:41:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:41:40,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:41:40,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 243 transitions, 1382 flow. Second operand has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:41:40,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:40,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:41:40,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:42,070 INFO L130 PetriNetUnfolder]: 2424/6729 cut-off events. [2022-11-20 10:41:42,071 INFO L131 PetriNetUnfolder]: For 20241/25324 co-relation queries the response was YES. [2022-11-20 10:41:42,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22335 conditions, 6729 events. 2424/6729 cut-off events. For 20241/25324 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 61907 event pairs, 719 based on Foata normal form. 162/6179 useless extension candidates. Maximal degree in co-relation 22196. Up to 3700 conditions per place. [2022-11-20 10:41:42,130 INFO L137 encePairwiseOnDemand]: 154/162 looper letters, 139 selfloop transitions, 22 changer transitions 0/278 dead transitions. [2022-11-20 10:41:42,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 278 transitions, 1978 flow [2022-11-20 10:41:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:41:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:41:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 749 transitions. [2022-11-20 10:41:42,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7705761316872428 [2022-11-20 10:41:42,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 749 transitions. [2022-11-20 10:41:42,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 749 transitions. [2022-11-20 10:41:42,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:42,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 749 transitions. [2022-11-20 10:41:42,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 10:41:42,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:41:42,137 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:41:42,137 INFO L175 Difference]: Start difference. First operand has 220 places, 243 transitions, 1382 flow. Second operand 6 states and 749 transitions. [2022-11-20 10:41:42,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 278 transitions, 1978 flow [2022-11-20 10:41:42,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 278 transitions, 1919 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-11-20 10:41:42,200 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 1472 flow [2022-11-20 10:41:42,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1472, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2022-11-20 10:41:42,201 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 88 predicate places. [2022-11-20 10:41:42,201 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 1472 flow [2022-11-20 10:41:42,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 10:41:42,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:42,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:42,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:42,407 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash 647870485, now seen corresponding path program 4 times [2022-11-20 10:41:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:42,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557795555] [2022-11-20 10:41:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:43,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557795555] [2022-11-20 10:41:43,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557795555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:43,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409938791] [2022-11-20 10:41:43,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:41:43,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:43,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:43,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:43,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:41:43,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:41:43,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:41:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:44,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:41:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:44,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:45,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:45,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:41:45,351 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:45,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:41:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:46,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:46,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 10:41:46,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:41:46,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 146 [2022-11-20 10:41:46,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-11-20 10:41:46,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 94 [2022-11-20 10:41:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:47,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409938791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:47,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:47,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 58 [2022-11-20 10:41:47,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648041652] [2022-11-20 10:41:47,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:47,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 10:41:47,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 10:41:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3171, Unknown=3, NotChecked=0, Total=3422 [2022-11-20 10:41:47,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2022-11-20 10:41:47,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 1472 flow. Second operand has 59 states, 59 states have (on average 84.08474576271186) internal successors, (4961), 59 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states 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 10:41:47,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:47,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2022-11-20 10:41:47,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:52,032 INFO L130 PetriNetUnfolder]: 2491/7353 cut-off events. [2022-11-20 10:41:52,032 INFO L131 PetriNetUnfolder]: For 21644/26035 co-relation queries the response was YES. [2022-11-20 10:41:52,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24021 conditions, 7353 events. 2491/7353 cut-off events. For 21644/26035 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 70084 event pairs, 303 based on Foata normal form. 923/7656 useless extension candidates. Maximal degree in co-relation 23855. Up to 2263 conditions per place. [2022-11-20 10:41:52,103 INFO L137 encePairwiseOnDemand]: 128/162 looper letters, 143 selfloop transitions, 109 changer transitions 0/321 dead transitions. [2022-11-20 10:41:52,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 321 transitions, 2503 flow [2022-11-20 10:41:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:41:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 10:41:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2931 transitions. [2022-11-20 10:41:52,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5321350762527233 [2022-11-20 10:41:52,108 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2931 transitions. [2022-11-20 10:41:52,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2931 transitions. [2022-11-20 10:41:52,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:52,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2931 transitions. [2022-11-20 10:41:52,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 86.20588235294117) internal successors, (2931), 34 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states 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 10:41:52,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 162.0) internal successors, (5670), 35 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 10:41:52,124 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 162.0) internal successors, (5670), 35 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 10:41:52,124 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 1472 flow. Second operand 34 states and 2931 transitions. [2022-11-20 10:41:52,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 321 transitions, 2503 flow [2022-11-20 10:41:52,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 321 transitions, 2453 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-20 10:41:52,209 INFO L231 Difference]: Finished difference. Result has 262 places, 286 transitions, 2116 flow [2022-11-20 10:41:52,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2116, PETRI_PLACES=262, PETRI_TRANSITIONS=286} [2022-11-20 10:41:52,210 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 124 predicate places. [2022-11-20 10:41:52,210 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 286 transitions, 2116 flow [2022-11-20 10:41:52,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 84.08474576271186) internal successors, (4961), 59 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states 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 10:41:52,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:52,212 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:52,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:41:52,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:52,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 506604634, now seen corresponding path program 1 times [2022-11-20 10:41:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:52,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250987922] [2022-11-20 10:41:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250987922] [2022-11-20 10:41:52,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250987922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130104210] [2022-11-20 10:41:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:52,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:52,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:52,495 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:52,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:41:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:41:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:52,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:53,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130104210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:53,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:41:53,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 10:41:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172208771] [2022-11-20 10:41:53,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:53,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:41:53,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:41:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:41:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:41:53,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 162 [2022-11-20 10:41:53,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 286 transitions, 2116 flow. Second operand has 19 states, 19 states have (on average 113.36842105263158) internal successors, (2154), 19 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states 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 10:41:53,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:41:53,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 162 [2022-11-20 10:41:53,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:41:55,162 INFO L130 PetriNetUnfolder]: 1895/7464 cut-off events. [2022-11-20 10:41:55,162 INFO L131 PetriNetUnfolder]: For 42956/44358 co-relation queries the response was YES. [2022-11-20 10:41:55,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 7464 events. 1895/7464 cut-off events. For 42956/44358 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 77234 event pairs, 338 based on Foata normal form. 565/7514 useless extension candidates. Maximal degree in co-relation 28276. Up to 1763 conditions per place. [2022-11-20 10:41:55,226 INFO L137 encePairwiseOnDemand]: 144/162 looper letters, 173 selfloop transitions, 38 changer transitions 0/352 dead transitions. [2022-11-20 10:41:55,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 352 transitions, 3181 flow [2022-11-20 10:41:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:41:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 10:41:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2508 transitions. [2022-11-20 10:41:55,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2022-11-20 10:41:55,231 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2508 transitions. [2022-11-20 10:41:55,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2508 transitions. [2022-11-20 10:41:55,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:41:55,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2508 transitions. [2022-11-20 10:41:55,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 114.0) internal successors, (2508), 22 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states 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 10:41:55,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 162.0) internal successors, (3726), 23 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states 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 10:41:55,243 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 162.0) internal successors, (3726), 23 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states 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 10:41:55,243 INFO L175 Difference]: Start difference. First operand has 262 places, 286 transitions, 2116 flow. Second operand 22 states and 2508 transitions. [2022-11-20 10:41:55,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 352 transitions, 3181 flow [2022-11-20 10:41:55,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 352 transitions, 3032 flow, removed 31 selfloop flow, removed 26 redundant places. [2022-11-20 10:41:55,448 INFO L231 Difference]: Finished difference. Result has 258 places, 253 transitions, 1770 flow [2022-11-20 10:41:55,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1770, PETRI_PLACES=258, PETRI_TRANSITIONS=253} [2022-11-20 10:41:55,450 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 120 predicate places. [2022-11-20 10:41:55,450 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 253 transitions, 1770 flow [2022-11-20 10:41:55,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 113.36842105263158) internal successors, (2154), 19 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states 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 10:41:55,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:41:55,451 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:55,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:41:55,657 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:41:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1947187217, now seen corresponding path program 1 times [2022-11-20 10:41:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:41:55,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261941311] [2022-11-20 10:41:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:41:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:57,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:41:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261941311] [2022-11-20 10:41:57,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261941311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:41:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206235675] [2022-11-20 10:41:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:41:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:41:57,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:41:57,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:41:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:57,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:41:57,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:57,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:41:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:58,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:41:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:58,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:41:59,156 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:41:59,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-20 10:41:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:59,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:59,392 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_327 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_327) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 2147483649))) is different from false [2022-11-20 10:42:00,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:00,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 10:42:00,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:00,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2022-11-20 10:42:00,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-20 10:42:00,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-20 10:42:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:02,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206235675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:02,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:02,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-11-20 10:42:02,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9108794] [2022-11-20 10:42:02,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:02,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 10:42:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 10:42:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3652, Unknown=3, NotChecked=122, Total=4032 [2022-11-20 10:42:02,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 162 [2022-11-20 10:42:02,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 253 transitions, 1770 flow. Second operand has 64 states, 64 states have (on average 81.0) internal successors, (5184), 64 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 10:42:02,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:02,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 162 [2022-11-20 10:42:02,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:06,966 INFO L130 PetriNetUnfolder]: 2648/8864 cut-off events. [2022-11-20 10:42:06,967 INFO L131 PetriNetUnfolder]: For 38181/41520 co-relation queries the response was YES. [2022-11-20 10:42:07,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32169 conditions, 8864 events. 2648/8864 cut-off events. For 38181/41520 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 94149 event pairs, 357 based on Foata normal form. 625/9051 useless extension candidates. Maximal degree in co-relation 31982. Up to 2848 conditions per place. [2022-11-20 10:42:07,053 INFO L137 encePairwiseOnDemand]: 130/162 looper letters, 152 selfloop transitions, 83 changer transitions 0/309 dead transitions. [2022-11-20 10:42:07,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 309 transitions, 2644 flow [2022-11-20 10:42:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:42:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 10:42:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2493 transitions. [2022-11-20 10:42:07,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.512962962962963 [2022-11-20 10:42:07,058 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2493 transitions. [2022-11-20 10:42:07,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2493 transitions. [2022-11-20 10:42:07,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:07,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2493 transitions. [2022-11-20 10:42:07,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 83.1) internal successors, (2493), 30 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states 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 10:42:07,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 162.0) internal successors, (5022), 31 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states 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 10:42:07,072 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 162.0) internal successors, (5022), 31 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states 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 10:42:07,072 INFO L175 Difference]: Start difference. First operand has 258 places, 253 transitions, 1770 flow. Second operand 30 states and 2493 transitions. [2022-11-20 10:42:07,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 309 transitions, 2644 flow [2022-11-20 10:42:07,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 309 transitions, 2608 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-11-20 10:42:07,304 INFO L231 Difference]: Finished difference. Result has 279 places, 275 transitions, 2184 flow [2022-11-20 10:42:07,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2184, PETRI_PLACES=279, PETRI_TRANSITIONS=275} [2022-11-20 10:42:07,305 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 141 predicate places. [2022-11-20 10:42:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 275 transitions, 2184 flow [2022-11-20 10:42:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 81.0) internal successors, (5184), 64 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 10:42:07,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:07,307 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:07,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:07,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:42:07,517 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash 840789581, now seen corresponding path program 2 times [2022-11-20 10:42:07,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:07,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072379564] [2022-11-20 10:42:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072379564] [2022-11-20 10:42:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072379564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305396230] [2022-11-20 10:42:08,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:08,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:08,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:08,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:08,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:42:08,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:42:08,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:08,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:42:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:08,582 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:42:08,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:42:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:08,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:42:08,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305396230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:08,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:42:08,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-20 10:42:08,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766305948] [2022-11-20 10:42:08,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:08,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:42:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:42:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:42:08,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:42:08,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 275 transitions, 2184 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:08,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:08,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:42:08,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:10,411 INFO L130 PetriNetUnfolder]: 2745/8958 cut-off events. [2022-11-20 10:42:10,411 INFO L131 PetriNetUnfolder]: For 50745/57150 co-relation queries the response was YES. [2022-11-20 10:42:10,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35392 conditions, 8958 events. 2745/8958 cut-off events. For 50745/57150 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 94630 event pairs, 903 based on Foata normal form. 289/8718 useless extension candidates. Maximal degree in co-relation 35221. Up to 5096 conditions per place. [2022-11-20 10:42:10,476 INFO L137 encePairwiseOnDemand]: 152/162 looper letters, 139 selfloop transitions, 35 changer transitions 1/300 dead transitions. [2022-11-20 10:42:10,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 300 transitions, 2731 flow [2022-11-20 10:42:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:42:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:42:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 752 transitions. [2022-11-20 10:42:10,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7736625514403292 [2022-11-20 10:42:10,478 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 752 transitions. [2022-11-20 10:42:10,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 752 transitions. [2022-11-20 10:42:10,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:10,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 752 transitions. [2022-11-20 10:42:10,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 10:42:10,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:42:10,482 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:42:10,482 INFO L175 Difference]: Start difference. First operand has 279 places, 275 transitions, 2184 flow. Second operand 6 states and 752 transitions. [2022-11-20 10:42:10,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 300 transitions, 2731 flow [2022-11-20 10:42:10,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 300 transitions, 2664 flow, removed 11 selfloop flow, removed 21 redundant places. [2022-11-20 10:42:10,698 INFO L231 Difference]: Finished difference. Result has 266 places, 285 transitions, 2332 flow [2022-11-20 10:42:10,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2332, PETRI_PLACES=266, PETRI_TRANSITIONS=285} [2022-11-20 10:42:10,699 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 128 predicate places. [2022-11-20 10:42:10,699 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 285 transitions, 2332 flow [2022-11-20 10:42:10,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:10,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:10,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:10,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:10,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:42:10,905 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1282295723, now seen corresponding path program 3 times [2022-11-20 10:42:10,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:10,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780427809] [2022-11-20 10:42:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:10,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:11,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780427809] [2022-11-20 10:42:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780427809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163413672] [2022-11-20 10:42:11,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:42:11,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:11,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:11,839 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:11,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:42:11,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:42:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:42:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:12,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 10:42:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:12,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:42:12,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163413672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:12,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:42:12,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 20 [2022-11-20 10:42:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126282767] [2022-11-20 10:42:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:42:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:42:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:42:12,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:42:12,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 285 transitions, 2332 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:12,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:12,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:42:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:13,975 INFO L130 PetriNetUnfolder]: 2725/8889 cut-off events. [2022-11-20 10:42:13,975 INFO L131 PetriNetUnfolder]: For 56385/62834 co-relation queries the response was YES. [2022-11-20 10:42:14,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37427 conditions, 8889 events. 2725/8889 cut-off events. For 56385/62834 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 93814 event pairs, 889 based on Foata normal form. 288/8644 useless extension candidates. Maximal degree in co-relation 37266. Up to 5060 conditions per place. [2022-11-20 10:42:14,055 INFO L137 encePairwiseOnDemand]: 156/162 looper letters, 155 selfloop transitions, 23 changer transitions 1/304 dead transitions. [2022-11-20 10:42:14,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 304 transitions, 2848 flow [2022-11-20 10:42:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:42:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:42:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 749 transitions. [2022-11-20 10:42:14,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7705761316872428 [2022-11-20 10:42:14,058 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 749 transitions. [2022-11-20 10:42:14,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 749 transitions. [2022-11-20 10:42:14,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:14,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 749 transitions. [2022-11-20 10:42:14,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states 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 10:42:14,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:42:14,061 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:42:14,061 INFO L175 Difference]: Start difference. First operand has 266 places, 285 transitions, 2332 flow. Second operand 6 states and 749 transitions. [2022-11-20 10:42:14,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 304 transitions, 2848 flow [2022-11-20 10:42:14,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 304 transitions, 2784 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-20 10:42:14,346 INFO L231 Difference]: Finished difference. Result has 270 places, 285 transitions, 2328 flow [2022-11-20 10:42:14,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2328, PETRI_PLACES=270, PETRI_TRANSITIONS=285} [2022-11-20 10:42:14,347 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 132 predicate places. [2022-11-20 10:42:14,347 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 285 transitions, 2328 flow [2022-11-20 10:42:14,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:14,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:14,348 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:14,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:42:14,559 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1818755951, now seen corresponding path program 4 times [2022-11-20 10:42:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:14,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957862714] [2022-11-20 10:42:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:15,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:15,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957862714] [2022-11-20 10:42:15,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957862714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:15,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178962782] [2022-11-20 10:42:15,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:42:15,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:15,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:15,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:15,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:42:15,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:42:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:42:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:15,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:42:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:16,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:42:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:16,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:42:17,061 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:42:17,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-20 10:42:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:17,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:18,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:18,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 10:42:18,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:18,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-20 10:42:18,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2022-11-20 10:42:18,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-20 10:42:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178962782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:19,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:19,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 58 [2022-11-20 10:42:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7930224] [2022-11-20 10:42:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 10:42:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 10:42:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3178, Unknown=7, NotChecked=0, Total=3422 [2022-11-20 10:42:19,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2022-11-20 10:42:19,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 285 transitions, 2328 flow. Second operand has 59 states, 59 states have (on average 84.13559322033899) internal successors, (4964), 59 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 10:42:19,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:19,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2022-11-20 10:42:19,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:23,858 INFO L130 PetriNetUnfolder]: 2748/9194 cut-off events. [2022-11-20 10:42:23,858 INFO L131 PetriNetUnfolder]: For 59512/65331 co-relation queries the response was YES. [2022-11-20 10:42:23,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38462 conditions, 9194 events. 2748/9194 cut-off events. For 59512/65331 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 98200 event pairs, 439 based on Foata normal form. 1392/10132 useless extension candidates. Maximal degree in co-relation 38276. Up to 2897 conditions per place. [2022-11-20 10:42:23,934 INFO L137 encePairwiseOnDemand]: 127/162 looper letters, 138 selfloop transitions, 87 changer transitions 21/323 dead transitions. [2022-11-20 10:42:23,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 323 transitions, 3090 flow [2022-11-20 10:42:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 10:42:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 10:42:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2749 transitions. [2022-11-20 10:42:23,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5302854938271605 [2022-11-20 10:42:23,939 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2749 transitions. [2022-11-20 10:42:23,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2749 transitions. [2022-11-20 10:42:23,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:23,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2749 transitions. [2022-11-20 10:42:23,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.90625) internal successors, (2749), 32 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states 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 10:42:23,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 162.0) internal successors, (5346), 33 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states 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 10:42:23,952 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 162.0) internal successors, (5346), 33 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states 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 10:42:23,952 INFO L175 Difference]: Start difference. First operand has 270 places, 285 transitions, 2328 flow. Second operand 32 states and 2749 transitions. [2022-11-20 10:42:23,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 323 transitions, 3090 flow [2022-11-20 10:42:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 323 transitions, 3044 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:42:24,203 INFO L231 Difference]: Finished difference. Result has 299 places, 282 transitions, 2422 flow [2022-11-20 10:42:24,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2422, PETRI_PLACES=299, PETRI_TRANSITIONS=282} [2022-11-20 10:42:24,204 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 161 predicate places. [2022-11-20 10:42:24,204 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 282 transitions, 2422 flow [2022-11-20 10:42:24,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 84.13559322033899) internal successors, (4964), 59 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states 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 10:42:24,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:24,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:24,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:24,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash -646148369, now seen corresponding path program 1 times [2022-11-20 10:42:24,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:24,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463754416] [2022-11-20 10:42:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463754416] [2022-11-20 10:42:25,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463754416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218362570] [2022-11-20 10:42:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:25,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:25,667 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:25,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:42:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:25,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 10:42:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:26,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:42:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:27,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:42:27,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:27,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:42:27,807 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:42:27,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-20 10:42:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:27,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:29,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:29,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 10:42:29,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:29,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2022-11-20 10:42:29,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-20 10:42:29,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-20 10:42:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:30,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218362570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:30,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:30,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-11-20 10:42:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653670219] [2022-11-20 10:42:30,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:30,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 10:42:30,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 10:42:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3765, Unknown=2, NotChecked=0, Total=4032 [2022-11-20 10:42:30,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 162 [2022-11-20 10:42:30,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 282 transitions, 2422 flow. Second operand has 64 states, 64 states have (on average 81.0) internal successors, (5184), 64 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 10:42:30,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:30,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 162 [2022-11-20 10:42:30,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:35,912 INFO L130 PetriNetUnfolder]: 3342/10824 cut-off events. [2022-11-20 10:42:35,912 INFO L131 PetriNetUnfolder]: For 82494/91261 co-relation queries the response was YES. [2022-11-20 10:42:35,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49859 conditions, 10824 events. 3342/10824 cut-off events. For 82494/91261 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 117618 event pairs, 537 based on Foata normal form. 1358/11885 useless extension candidates. Maximal degree in co-relation 49649. Up to 4694 conditions per place. [2022-11-20 10:42:36,023 INFO L137 encePairwiseOnDemand]: 127/162 looper letters, 162 selfloop transitions, 129 changer transitions 0/365 dead transitions. [2022-11-20 10:42:36,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 365 transitions, 3970 flow [2022-11-20 10:42:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:42:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 10:42:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2735 transitions. [2022-11-20 10:42:36,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5115974560419004 [2022-11-20 10:42:36,029 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2735 transitions. [2022-11-20 10:42:36,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2735 transitions. [2022-11-20 10:42:36,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:36,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2735 transitions. [2022-11-20 10:42:36,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 82.87878787878788) internal successors, (2735), 33 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states 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 10:42:36,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 162.0) internal successors, (5508), 34 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 10:42:36,042 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 162.0) internal successors, (5508), 34 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states 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 10:42:36,042 INFO L175 Difference]: Start difference. First operand has 299 places, 282 transitions, 2422 flow. Second operand 33 states and 2735 transitions. [2022-11-20 10:42:36,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 365 transitions, 3970 flow [2022-11-20 10:42:36,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 365 transitions, 3871 flow, removed 9 selfloop flow, removed 27 redundant places. [2022-11-20 10:42:36,519 INFO L231 Difference]: Finished difference. Result has 307 places, 345 transitions, 3689 flow [2022-11-20 10:42:36,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3689, PETRI_PLACES=307, PETRI_TRANSITIONS=345} [2022-11-20 10:42:36,520 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 169 predicate places. [2022-11-20 10:42:36,520 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 345 transitions, 3689 flow [2022-11-20 10:42:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 81.0) internal successors, (5184), 64 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states 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 10:42:36,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:36,521 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:36,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:36,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:36,727 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1098884883, now seen corresponding path program 2 times [2022-11-20 10:42:36,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346818427] [2022-11-20 10:42:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:36,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346818427] [2022-11-20 10:42:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346818427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953660448] [2022-11-20 10:42:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:37,547 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:37,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:42:37,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:42:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:37,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:42:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:37,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 10:42:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:37,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:42:37,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953660448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:37,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:42:37,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 20 [2022-11-20 10:42:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109528303] [2022-11-20 10:42:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:42:37,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:42:37,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:42:37,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:42:37,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 345 transitions, 3689 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:37,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:37,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:42:37,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:41,095 INFO L130 PetriNetUnfolder]: 4036/12548 cut-off events. [2022-11-20 10:42:41,095 INFO L131 PetriNetUnfolder]: For 136301/155718 co-relation queries the response was YES. [2022-11-20 10:42:41,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65979 conditions, 12548 events. 4036/12548 cut-off events. For 136301/155718 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 138446 event pairs, 1220 based on Foata normal form. 1054/12890 useless extension candidates. Maximal degree in co-relation 65792. Up to 5888 conditions per place. [2022-11-20 10:42:41,297 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 278 selfloop transitions, 24 changer transitions 0/428 dead transitions. [2022-11-20 10:42:41,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 428 transitions, 5597 flow [2022-11-20 10:42:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:42:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:42:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 754 transitions. [2022-11-20 10:42:41,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7757201646090535 [2022-11-20 10:42:41,299 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 754 transitions. [2022-11-20 10:42:41,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 754 transitions. [2022-11-20 10:42:41,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:41,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 754 transitions. [2022-11-20 10:42:41,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states 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 10:42:41,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:42:41,301 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:42:41,301 INFO L175 Difference]: Start difference. First operand has 307 places, 345 transitions, 3689 flow. Second operand 6 states and 754 transitions. [2022-11-20 10:42:41,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 428 transitions, 5597 flow [2022-11-20 10:42:42,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 428 transitions, 5476 flow, removed 32 selfloop flow, removed 24 redundant places. [2022-11-20 10:42:42,696 INFO L231 Difference]: Finished difference. Result has 289 places, 349 transitions, 3736 flow [2022-11-20 10:42:42,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3736, PETRI_PLACES=289, PETRI_TRANSITIONS=349} [2022-11-20 10:42:42,697 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 151 predicate places. [2022-11-20 10:42:42,698 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 349 transitions, 3736 flow [2022-11-20 10:42:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:42,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:42,699 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:42,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:42,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 10:42:42,899 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash -463962155, now seen corresponding path program 2 times [2022-11-20 10:42:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844997841] [2022-11-20 10:42:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:42,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:43,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844997841] [2022-11-20 10:42:43,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844997841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:43,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470777285] [2022-11-20 10:42:43,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:43,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:43,067 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:43,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:42:43,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:42:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:42:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:42:43,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:42:43,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470777285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:43,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:43,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 10:42:43,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720772540] [2022-11-20 10:42:43,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:43,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:42:43,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:42:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:42:43,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 162 [2022-11-20 10:42:43,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 349 transitions, 3736 flow. Second operand has 18 states, 18 states have (on average 121.61111111111111) internal successors, (2189), 18 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states 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 10:42:43,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:43,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 162 [2022-11-20 10:42:43,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:42:47,946 INFO L130 PetriNetUnfolder]: 3512/14955 cut-off events. [2022-11-20 10:42:47,946 INFO L131 PetriNetUnfolder]: For 161847/171754 co-relation queries the response was YES. [2022-11-20 10:42:48,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72712 conditions, 14955 events. 3512/14955 cut-off events. For 161847/171754 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 180389 event pairs, 490 based on Foata normal form. 943/15463 useless extension candidates. Maximal degree in co-relation 72535. Up to 3541 conditions per place. [2022-11-20 10:42:48,230 INFO L137 encePairwiseOnDemand]: 151/162 looper letters, 464 selfloop transitions, 25 changer transitions 0/699 dead transitions. [2022-11-20 10:42:48,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 699 transitions, 10132 flow [2022-11-20 10:42:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:42:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 10:42:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2931 transitions. [2022-11-20 10:42:48,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.753858024691358 [2022-11-20 10:42:48,233 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2931 transitions. [2022-11-20 10:42:48,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2931 transitions. [2022-11-20 10:42:48,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:42:48,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2931 transitions. [2022-11-20 10:42:48,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 122.125) internal successors, (2931), 24 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states 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 10:42:48,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 162.0) internal successors, (4050), 25 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states 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 10:42:48,239 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 162.0) internal successors, (4050), 25 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states 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 10:42:48,239 INFO L175 Difference]: Start difference. First operand has 289 places, 349 transitions, 3736 flow. Second operand 24 states and 2931 transitions. [2022-11-20 10:42:48,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 699 transitions, 10132 flow [2022-11-20 10:42:49,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 699 transitions, 9988 flow, removed 50 selfloop flow, removed 6 redundant places. [2022-11-20 10:42:49,266 INFO L231 Difference]: Finished difference. Result has 306 places, 353 transitions, 3763 flow [2022-11-20 10:42:49,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3763, PETRI_PLACES=306, PETRI_TRANSITIONS=353} [2022-11-20 10:42:49,267 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 168 predicate places. [2022-11-20 10:42:49,267 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 353 transitions, 3763 flow [2022-11-20 10:42:49,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.61111111111111) internal successors, (2189), 18 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states 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 10:42:49,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:42:49,268 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:49,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:49,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 10:42:49,474 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:42:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:49,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1759317807, now seen corresponding path program 1 times [2022-11-20 10:42:49,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:49,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440416535] [2022-11-20 10:42:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:49,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440416535] [2022-11-20 10:42:50,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440416535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418057789] [2022-11-20 10:42:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:50,997 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:51,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:42:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:42:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:51,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:42:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:52,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:42:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:52,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:42:53,014 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:42:53,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:42:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:53,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:54,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:54,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 10:42:54,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:42:54,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 146 [2022-11-20 10:42:54,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-11-20 10:42:54,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 94 [2022-11-20 10:42:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:55,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418057789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:55,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:55,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 67 [2022-11-20 10:42:55,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433077426] [2022-11-20 10:42:55,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:55,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 10:42:55,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 10:42:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4269, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:42:55,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 162 [2022-11-20 10:42:55,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 353 transitions, 3763 flow. Second operand has 68 states, 68 states have (on average 64.32352941176471) internal successors, (4374), 68 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states 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 10:42:55,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:42:55,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 162 [2022-11-20 10:42:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:43:04,643 INFO L130 PetriNetUnfolder]: 6594/21136 cut-off events. [2022-11-20 10:43:04,643 INFO L131 PetriNetUnfolder]: For 211485/238720 co-relation queries the response was YES. [2022-11-20 10:43:04,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108682 conditions, 21136 events. 6594/21136 cut-off events. For 211485/238720 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 247304 event pairs, 1026 based on Foata normal form. 3968/24505 useless extension candidates. Maximal degree in co-relation 108343. Up to 8932 conditions per place. [2022-11-20 10:43:05,031 INFO L137 encePairwiseOnDemand]: 124/162 looper letters, 198 selfloop transitions, 123 changer transitions 0/385 dead transitions. [2022-11-20 10:43:05,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 385 transitions, 4653 flow [2022-11-20 10:43:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:43:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 10:43:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2252 transitions. [2022-11-20 10:43:05,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40885984023238925 [2022-11-20 10:43:05,035 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2252 transitions. [2022-11-20 10:43:05,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2252 transitions. [2022-11-20 10:43:05,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:43:05,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2252 transitions. [2022-11-20 10:43:05,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.23529411764706) internal successors, (2252), 34 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states 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 10:43:05,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 162.0) internal successors, (5670), 35 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 10:43:05,043 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 162.0) internal successors, (5670), 35 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 10:43:05,043 INFO L175 Difference]: Start difference. First operand has 306 places, 353 transitions, 3763 flow. Second operand 34 states and 2252 transitions. [2022-11-20 10:43:05,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 385 transitions, 4653 flow [2022-11-20 10:43:06,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 385 transitions, 4587 flow, removed 3 selfloop flow, removed 18 redundant places. [2022-11-20 10:43:06,911 INFO L231 Difference]: Finished difference. Result has 322 places, 360 transitions, 4062 flow [2022-11-20 10:43:06,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4062, PETRI_PLACES=322, PETRI_TRANSITIONS=360} [2022-11-20 10:43:06,912 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 184 predicate places. [2022-11-20 10:43:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 360 transitions, 4062 flow [2022-11-20 10:43:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 64.32352941176471) internal successors, (4374), 68 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states 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 10:43:06,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:43:06,913 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:06,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:07,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 10:43:07,115 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:43:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash 798196105, now seen corresponding path program 2 times [2022-11-20 10:43:07,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:43:07,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699868199] [2022-11-20 10:43:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:07,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:43:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:43:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699868199] [2022-11-20 10:43:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699868199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:43:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828084069] [2022-11-20 10:43:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:43:07,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:43:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:43:07,709 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:43:07,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:43:07,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:43:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:43:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:08,096 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:43:08,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 10:43:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:43:08,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:43:08,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828084069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:43:08,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:43:08,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-20 10:43:08,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144869030] [2022-11-20 10:43:08,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:43:08,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:43:08,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:43:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:43:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:43:08,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:43:08,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 360 transitions, 4062 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:08,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:43:08,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:43:08,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:43:13,389 INFO L130 PetriNetUnfolder]: 6894/21216 cut-off events. [2022-11-20 10:43:13,389 INFO L131 PetriNetUnfolder]: For 245691/287996 co-relation queries the response was YES. [2022-11-20 10:43:13,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116555 conditions, 21216 events. 6894/21216 cut-off events. For 245691/287996 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 245379 event pairs, 2085 based on Foata normal form. 1673/22048 useless extension candidates. Maximal degree in co-relation 112702. Up to 12145 conditions per place. [2022-11-20 10:43:13,602 INFO L137 encePairwiseOnDemand]: 152/162 looper letters, 242 selfloop transitions, 58 changer transitions 0/430 dead transitions. [2022-11-20 10:43:13,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 430 transitions, 5778 flow [2022-11-20 10:43:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:43:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:43:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 754 transitions. [2022-11-20 10:43:13,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7757201646090535 [2022-11-20 10:43:13,603 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 754 transitions. [2022-11-20 10:43:13,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 754 transitions. [2022-11-20 10:43:13,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:43:13,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 754 transitions. [2022-11-20 10:43:13,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states 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 10:43:13,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:43:13,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:43:13,606 INFO L175 Difference]: Start difference. First operand has 322 places, 360 transitions, 4062 flow. Second operand 6 states and 754 transitions. [2022-11-20 10:43:13,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 430 transitions, 5778 flow [2022-11-20 10:43:15,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 430 transitions, 5686 flow, removed 9 selfloop flow, removed 27 redundant places. [2022-11-20 10:43:15,969 INFO L231 Difference]: Finished difference. Result has 303 places, 372 transitions, 4416 flow [2022-11-20 10:43:15,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4416, PETRI_PLACES=303, PETRI_TRANSITIONS=372} [2022-11-20 10:43:15,969 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 165 predicate places. [2022-11-20 10:43:15,970 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 372 transitions, 4416 flow [2022-11-20 10:43:15,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:15,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:43:15,970 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:15,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:16,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:43:16,171 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:43:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash -527151093, now seen corresponding path program 1 times [2022-11-20 10:43:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:43:16,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322427529] [2022-11-20 10:43:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:16,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:43:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:16,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:43:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322427529] [2022-11-20 10:43:16,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322427529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:43:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104666450] [2022-11-20 10:43:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:16,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:43:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:43:16,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:43:16,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:43:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 10:43:17,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:17,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:43:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:18,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:43:18,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:18,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:43:18,652 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:43:18,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-20 10:43:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:18,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:19,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:43:19,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 10:43:19,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:43:19,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-20 10:43:19,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2022-11-20 10:43:19,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-20 10:43:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:20,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104666450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:20,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:43:20,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 58 [2022-11-20 10:43:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202920958] [2022-11-20 10:43:20,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:20,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 10:43:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:43:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 10:43:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3181, Unknown=4, NotChecked=0, Total=3422 [2022-11-20 10:43:20,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2022-11-20 10:43:20,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 372 transitions, 4416 flow. Second operand has 59 states, 59 states have (on average 84.1864406779661) internal successors, (4967), 59 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states 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 10:43:20,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:43:20,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2022-11-20 10:43:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:43:29,063 INFO L130 PetriNetUnfolder]: 6946/22526 cut-off events. [2022-11-20 10:43:29,063 INFO L131 PetriNetUnfolder]: For 271181/304516 co-relation queries the response was YES. [2022-11-20 10:43:29,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122724 conditions, 22526 events. 6946/22526 cut-off events. For 271181/304516 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 267586 event pairs, 963 based on Foata normal form. 4439/26336 useless extension candidates. Maximal degree in co-relation 122160. Up to 8871 conditions per place. [2022-11-20 10:43:29,295 INFO L137 encePairwiseOnDemand]: 127/162 looper letters, 157 selfloop transitions, 165 changer transitions 2/401 dead transitions. [2022-11-20 10:43:29,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 401 transitions, 5317 flow [2022-11-20 10:43:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 10:43:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-20 10:43:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3004 transitions. [2022-11-20 10:43:29,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5298059964726631 [2022-11-20 10:43:29,301 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3004 transitions. [2022-11-20 10:43:29,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3004 transitions. [2022-11-20 10:43:29,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:43:29,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3004 transitions. [2022-11-20 10:43:29,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 85.82857142857142) internal successors, (3004), 35 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states 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 10:43:29,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 162.0) internal successors, (5832), 36 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states 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 10:43:29,315 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 162.0) internal successors, (5832), 36 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states 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 10:43:29,316 INFO L175 Difference]: Start difference. First operand has 303 places, 372 transitions, 4416 flow. Second operand 35 states and 3004 transitions. [2022-11-20 10:43:29,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 401 transitions, 5317 flow [2022-11-20 10:43:31,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 401 transitions, 5239 flow, removed 31 selfloop flow, removed 1 redundant places. [2022-11-20 10:43:31,599 INFO L231 Difference]: Finished difference. Result has 339 places, 379 transitions, 4930 flow [2022-11-20 10:43:31,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=4338, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4930, PETRI_PLACES=339, PETRI_TRANSITIONS=379} [2022-11-20 10:43:31,601 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 201 predicate places. [2022-11-20 10:43:31,601 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 379 transitions, 4930 flow [2022-11-20 10:43:31,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 84.1864406779661) internal successors, (4967), 59 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states 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 10:43:31,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:43:31,602 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:31,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:43:31,802 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:43:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1179824911, now seen corresponding path program 3 times [2022-11-20 10:43:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:43:31,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650488503] [2022-11-20 10:43:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:31,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:43:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:32,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:43:32,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650488503] [2022-11-20 10:43:32,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650488503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:43:32,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353906505] [2022-11-20 10:43:32,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:43:32,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:43:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:43:32,887 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:43:32,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:43:32,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:43:32,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:43:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:33,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 10:43:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:43:33,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:43:33,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353906505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:43:33,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:43:33,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 26 [2022-11-20 10:43:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260445799] [2022-11-20 10:43:33,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:43:33,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:43:33,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:43:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:43:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:43:33,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 162 [2022-11-20 10:43:33,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 379 transitions, 4930 flow. Second operand has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:33,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:43:33,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 162 [2022-11-20 10:43:33,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:43:38,438 INFO L130 PetriNetUnfolder]: 6751/20620 cut-off events. [2022-11-20 10:43:38,439 INFO L131 PetriNetUnfolder]: For 310112/345167 co-relation queries the response was YES. [2022-11-20 10:43:38,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123752 conditions, 20620 events. 6751/20620 cut-off events. For 310112/345167 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 235938 event pairs, 1940 based on Foata normal form. 1652/21491 useless extension candidates. Maximal degree in co-relation 122651. Up to 11370 conditions per place. [2022-11-20 10:43:38,678 INFO L137 encePairwiseOnDemand]: 155/162 looper letters, 278 selfloop transitions, 42 changer transitions 0/450 dead transitions. [2022-11-20 10:43:38,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 450 transitions, 6801 flow [2022-11-20 10:43:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:43:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:43:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 750 transitions. [2022-11-20 10:43:38,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7716049382716049 [2022-11-20 10:43:38,680 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 750 transitions. [2022-11-20 10:43:38,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 750 transitions. [2022-11-20 10:43:38,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:43:38,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 750 transitions. [2022-11-20 10:43:38,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 10:43:38,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:43:38,683 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 10:43:38,683 INFO L175 Difference]: Start difference. First operand has 339 places, 379 transitions, 4930 flow. Second operand 6 states and 750 transitions. [2022-11-20 10:43:38,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 450 transitions, 6801 flow [2022-11-20 10:43:41,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 450 transitions, 6634 flow, removed 16 selfloop flow, removed 28 redundant places. [2022-11-20 10:43:41,075 INFO L231 Difference]: Finished difference. Result has 317 places, 389 transitions, 5143 flow [2022-11-20 10:43:41,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5143, PETRI_PLACES=317, PETRI_TRANSITIONS=389} [2022-11-20 10:43:41,075 INFO L288 CegarLoopForPetriNet]: 138 programPoint places, 179 predicate places. [2022-11-20 10:43:41,076 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 389 transitions, 5143 flow [2022-11-20 10:43:41,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.33333333333333) internal successors, (716), 6 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:41,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:43:41,076 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:41,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:41,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 10:43:41,277 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-11-20 10:43:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1459604347, now seen corresponding path program 1 times [2022-11-20 10:43:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:43:41,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934990694] [2022-11-20 10:43:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:43:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:43:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934990694] [2022-11-20 10:43:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934990694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:43:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50618331] [2022-11-20 10:43:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:42,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:43:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:43:42,024 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:43:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b89621f9-7ded-49e3-82c0-3367e651bdde/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:43:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:43:42,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:42,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:43:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:43,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:43:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:43,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:43:43,766 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:43:43,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-20 10:43:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:43,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:44,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:43:44,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-20 10:43:44,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:43:44,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-20 10:43:44,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2022-11-20 10:43:44,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-20 10:43:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:45,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50618331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:45,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:43:45,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 58 [2022-11-20 10:43:45,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41786123] [2022-11-20 10:43:45,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:45,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 10:43:45,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:43:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 10:43:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3171, Unknown=4, NotChecked=0, Total=3422 [2022-11-20 10:43:45,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2022-11-20 10:43:45,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 389 transitions, 5143 flow. Second operand has 59 states, 59 states have (on average 84.1864406779661) internal successors, (4967), 59 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states 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 10:43:45,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:43:45,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2022-11-20 10:43:45,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand