./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/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_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/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_41abeb5f-d13b-472e-bcee-7352d80407cd/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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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 10:30:28,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:28,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:28,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:28,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:28,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:28,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:28,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:28,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:28,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:28,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:28,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:28,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:28,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:28,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:28,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:28,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:28,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:28,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:28,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:28,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:28,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:28,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:28,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:28,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:28,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:28,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:28,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:28,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:28,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:28,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:28,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:28,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:28,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:28,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:28,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:28,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:28,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:28,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:28,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:28,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:28,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 10:30:28,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:28,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:28,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:28,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:28,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:28,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:28,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:28,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:28,441 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:28,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:28,442 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:28,442 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:30:28,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:28,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:28,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:28,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:28,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:28,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:28,444 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 10:30:28,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:28,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:28,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:28,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:28,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:28,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:28,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:28,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:28,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:28,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:28,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:28,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:28,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:28,448 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:28,448 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:28,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:28,448 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_41abeb5f-d13b-472e-bcee-7352d80407cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-11-20 10:30:28,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:28,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:28,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:28,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:28,733 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:28,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-20 10:30:31,898 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:32,110 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:32,111 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-20 10:30:32,118 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/data/7226e8ed2/d8e4d582f58a47a7833dde6a82b23244/FLAG751cf17c6 [2022-11-20 10:30:32,133 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/data/7226e8ed2/d8e4d582f58a47a7833dde6a82b23244 [2022-11-20 10:30:32,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:32,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:32,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:32,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:32,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:32,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567116dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32, skipping insertion in model container [2022-11-20 10:30:32,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:32,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:32,368 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_41abeb5f-d13b-472e-bcee-7352d80407cd/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-20 10:30:32,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:32,393 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:32,423 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_41abeb5f-d13b-472e-bcee-7352d80407cd/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-20 10:30:32,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:32,440 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:32,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32 WrapperNode [2022-11-20 10:30:32,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:32,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:32,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:32,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:32,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,488 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 265 [2022-11-20 10:30:32,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:32,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:32,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:32,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:32,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,518 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:32,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:32,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:32,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:32,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (1/1) ... [2022-11-20 10:30:32,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:32,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:32,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:32,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:32,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:32,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:30:32,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:32,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:30:32,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:30:32,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:30:32,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:30:32,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:30:32,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:30:32,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:32,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:32,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:30:32,611 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 10:30:32,721 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:32,723 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:33,318 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:33,553 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:33,554 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 10:30:33,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:33 BoogieIcfgContainer [2022-11-20 10:30:33,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:33,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:33,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:33,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:33,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:32" (1/3) ... [2022-11-20 10:30:33,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ccc65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:33, skipping insertion in model container [2022-11-20 10:30:33,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:32" (2/3) ... [2022-11-20 10:30:33,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ccc65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:33, skipping insertion in model container [2022-11-20 10:30:33,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:33" (3/3) ... [2022-11-20 10:30:33,569 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-11-20 10:30:33,576 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:30:33,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:33,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-20 10:30:33,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:30:33,731 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:30:33,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 240 transitions, 504 flow [2022-11-20 10:30:33,856 INFO L130 PetriNetUnfolder]: 18/237 cut-off events. [2022-11-20 10:30:33,857 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:30:33,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 237 events. 18/237 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 194. Up to 3 conditions per place. [2022-11-20 10:30:33,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 240 transitions, 504 flow [2022-11-20 10:30:33,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 216 transitions, 447 flow [2022-11-20 10:30:33,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:33,887 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;@43c6b33d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:33,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-20 10:30:33,911 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-20 10:30:33,914 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:30:33,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:33,915 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] [2022-11-20 10:30:33,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -98747621, now seen corresponding path program 1 times [2022-11-20 10:30:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:33,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682983239] [2022-11-20 10:30:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:34,430 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 10:30:34,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:34,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682983239] [2022-11-20 10:30:34,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682983239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:34,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:34,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784825322] [2022-11-20 10:30:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:34,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2022-11-20 10:30:34,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 216 transitions, 447 flow. Second operand has 4 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:34,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:34,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2022-11-20 10:30:34,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:35,201 INFO L130 PetriNetUnfolder]: 585/1689 cut-off events. [2022-11-20 10:30:35,202 INFO L131 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2022-11-20 10:30:35,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2717 conditions, 1689 events. 585/1689 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10897 event pairs, 328 based on Foata normal form. 212/1259 useless extension candidates. Maximal degree in co-relation 1182. Up to 437 conditions per place. [2022-11-20 10:30:35,262 INFO L137 encePairwiseOnDemand]: 210/240 looper letters, 62 selfloop transitions, 9 changer transitions 5/231 dead transitions. [2022-11-20 10:30:35,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 231 transitions, 634 flow [2022-11-20 10:30:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:30:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:30:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1010 transitions. [2022-11-20 10:30:35,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8416666666666667 [2022-11-20 10:30:35,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1010 transitions. [2022-11-20 10:30:35,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1010 transitions. [2022-11-20 10:30:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:35,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1010 transitions. [2022-11-20 10:30:35,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,304 INFO L175 Difference]: Start difference. First operand has 209 places, 216 transitions, 447 flow. Second operand 5 states and 1010 transitions. [2022-11-20 10:30:35,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 231 transitions, 634 flow [2022-11-20 10:30:35,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 231 transitions, 616 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:35,315 INFO L231 Difference]: Finished difference. Result has 206 places, 201 transitions, 461 flow [2022-11-20 10:30:35,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=461, PETRI_PLACES=206, PETRI_TRANSITIONS=201} [2022-11-20 10:30:35,321 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -3 predicate places. [2022-11-20 10:30:35,322 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 201 transitions, 461 flow [2022-11-20 10:30:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:35,323 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:35,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1885358519, now seen corresponding path program 1 times [2022-11-20 10:30:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:35,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312303133] [2022-11-20 10:30:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:35,554 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 10:30:35,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:35,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312303133] [2022-11-20 10:30:35,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312303133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:35,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70064106] [2022-11-20 10:30:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:35,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:35,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:35,849 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 10:30:35,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:35,941 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 10:30:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70064106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:35,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:35,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 10:30:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669342055] [2022-11-20 10:30:35,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:30:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:30:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:30:35,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2022-11-20 10:30:35,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 201 transitions, 461 flow. Second operand has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:35,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:35,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2022-11-20 10:30:35,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:37,431 INFO L130 PetriNetUnfolder]: 1461/4084 cut-off events. [2022-11-20 10:30:37,432 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2022-11-20 10:30:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 4084 events. 1461/4084 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 30732 event pairs, 820 based on Foata normal form. 6/2510 useless extension candidates. Maximal degree in co-relation 5044. Up to 430 conditions per place. [2022-11-20 10:30:37,477 INFO L137 encePairwiseOnDemand]: 225/240 looper letters, 131 selfloop transitions, 40 changer transitions 0/326 dead transitions. [2022-11-20 10:30:37,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 1127 flow [2022-11-20 10:30:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:30:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:30:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3435 transitions. [2022-11-20 10:30:37,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7951388888888888 [2022-11-20 10:30:37,486 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3435 transitions. [2022-11-20 10:30:37,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3435 transitions. [2022-11-20 10:30:37,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:37,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3435 transitions. [2022-11-20 10:30:37,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 190.83333333333334) internal successors, (3435), 18 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:37,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 240.0) internal successors, (4560), 19 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:37,510 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 240.0) internal successors, (4560), 19 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:37,510 INFO L175 Difference]: Start difference. First operand has 206 places, 201 transitions, 461 flow. Second operand 18 states and 3435 transitions. [2022-11-20 10:30:37,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 1127 flow [2022-11-20 10:30:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 326 transitions, 1122 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:37,519 INFO L231 Difference]: Finished difference. Result has 221 places, 228 transitions, 694 flow [2022-11-20 10:30:37,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=694, PETRI_PLACES=221, PETRI_TRANSITIONS=228} [2022-11-20 10:30:37,520 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 12 predicate places. [2022-11-20 10:30:37,520 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 228 transitions, 694 flow [2022-11-20 10:30:37,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:37,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:37,522 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:37,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:37,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1683428737, now seen corresponding path program 1 times [2022-11-20 10:30:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:37,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304907256] [2022-11-20 10:30:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:38,044 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 10:30:38,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304907256] [2022-11-20 10:30:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304907256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:38,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696453151] [2022-11-20 10:30:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:38,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:38,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:38,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:38,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:38,262 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 10:30:38,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:38,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696453151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:38,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:30:38,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 10:30:38,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948879716] [2022-11-20 10:30:38,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:38,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:30:38,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:30:38,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:30:38,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2022-11-20 10:30:38,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 228 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:38,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:38,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2022-11-20 10:30:38,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:39,266 INFO L130 PetriNetUnfolder]: 1461/4076 cut-off events. [2022-11-20 10:30:39,266 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-11-20 10:30:39,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6610 conditions, 4076 events. 1461/4076 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 30656 event pairs, 820 based on Foata normal form. 8/2504 useless extension candidates. Maximal degree in co-relation 5260. Up to 1676 conditions per place. [2022-11-20 10:30:39,309 INFO L137 encePairwiseOnDemand]: 229/240 looper letters, 63 selfloop transitions, 27 changer transitions 0/245 dead transitions. [2022-11-20 10:30:39,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 245 transitions, 880 flow [2022-11-20 10:30:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:30:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:30:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1338 transitions. [2022-11-20 10:30:39,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7964285714285714 [2022-11-20 10:30:39,313 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1338 transitions. [2022-11-20 10:30:39,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1338 transitions. [2022-11-20 10:30:39,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:39,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1338 transitions. [2022-11-20 10:30:39,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.14285714285714) internal successors, (1338), 7 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:39,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:39,358 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:39,358 INFO L175 Difference]: Start difference. First operand has 221 places, 228 transitions, 694 flow. Second operand 7 states and 1338 transitions. [2022-11-20 10:30:39,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 245 transitions, 880 flow [2022-11-20 10:30:39,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 245 transitions, 806 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:39,367 INFO L231 Difference]: Finished difference. Result has 216 places, 220 transitions, 620 flow [2022-11-20 10:30:39,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=620, PETRI_PLACES=216, PETRI_TRANSITIONS=220} [2022-11-20 10:30:39,369 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 7 predicate places. [2022-11-20 10:30:39,369 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 220 transitions, 620 flow [2022-11-20 10:30:39,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:39,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:39,370 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:39,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:39,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:39,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1025953125, now seen corresponding path program 2 times [2022-11-20 10:30:39,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:39,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84661028] [2022-11-20 10:30:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:39,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:39,931 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 10:30:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84661028] [2022-11-20 10:30:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84661028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922279539] [2022-11-20 10:30:39,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:39,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:39,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:39,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:39,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:40,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:30:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:30:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:40,257 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 10:30:40,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:40,464 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 10:30:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922279539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:40,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:40,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-20 10:30:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130630897] [2022-11-20 10:30:40,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:30:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:30:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:30:40,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 240 [2022-11-20 10:30:40,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 220 transitions, 620 flow. Second operand has 18 states, 18 states have (on average 169.61111111111111) internal successors, (3053), 18 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:40,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:40,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 240 [2022-11-20 10:30:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:42,383 INFO L130 PetriNetUnfolder]: 897/3482 cut-off events. [2022-11-20 10:30:42,384 INFO L131 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2022-11-20 10:30:42,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5268 conditions, 3482 events. 897/3482 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 26225 event pairs, 546 based on Foata normal form. 4/2583 useless extension candidates. Maximal degree in co-relation 4206. Up to 231 conditions per place. [2022-11-20 10:30:42,416 INFO L137 encePairwiseOnDemand]: 217/240 looper letters, 156 selfloop transitions, 65 changer transitions 0/361 dead transitions. [2022-11-20 10:30:42,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 1439 flow [2022-11-20 10:30:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:30:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 10:30:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 8380 transitions. [2022-11-20 10:30:42,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7125850340136054 [2022-11-20 10:30:42,434 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 8380 transitions. [2022-11-20 10:30:42,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 8380 transitions. [2022-11-20 10:30:42,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:42,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 8380 transitions. [2022-11-20 10:30:42,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 171.0204081632653) internal successors, (8380), 49 states have internal predecessors, (8380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:42,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 240.0) internal successors, (12000), 50 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:42,484 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 240.0) internal successors, (12000), 50 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:42,485 INFO L175 Difference]: Start difference. First operand has 216 places, 220 transitions, 620 flow. Second operand 49 states and 8380 transitions. [2022-11-20 10:30:42,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 1439 flow [2022-11-20 10:30:42,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 361 transitions, 1396 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:42,494 INFO L231 Difference]: Finished difference. Result has 259 places, 242 transitions, 829 flow [2022-11-20 10:30:42,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=829, PETRI_PLACES=259, PETRI_TRANSITIONS=242} [2022-11-20 10:30:42,496 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 50 predicate places. [2022-11-20 10:30:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 242 transitions, 829 flow [2022-11-20 10:30:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 169.61111111111111) internal successors, (3053), 18 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:42,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:42,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:42,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:42,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:42,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1371972490, now seen corresponding path program 1 times [2022-11-20 10:30:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:42,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700410935] [2022-11-20 10:30:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:42,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:42,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700410935] [2022-11-20 10:30:42,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700410935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:42,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475232050] [2022-11-20 10:30:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:30:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:30:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:30:42,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 240 [2022-11-20 10:30:42,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 242 transitions, 829 flow. Second operand has 4 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:42,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:42,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 240 [2022-11-20 10:30:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:45,957 INFO L130 PetriNetUnfolder]: 4894/14038 cut-off events. [2022-11-20 10:30:45,957 INFO L131 PetriNetUnfolder]: For 362/362 co-relation queries the response was YES. [2022-11-20 10:30:46,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22901 conditions, 14038 events. 4894/14038 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 136718 event pairs, 2835 based on Foata normal form. 0/10279 useless extension candidates. Maximal degree in co-relation 22618. Up to 4194 conditions per place. [2022-11-20 10:30:46,121 INFO L137 encePairwiseOnDemand]: 234/240 looper letters, 50 selfloop transitions, 4 changer transitions 0/274 dead transitions. [2022-11-20 10:30:46,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 274 transitions, 1012 flow [2022-11-20 10:30:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:30:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:30:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1031 transitions. [2022-11-20 10:30:46,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8591666666666666 [2022-11-20 10:30:46,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1031 transitions. [2022-11-20 10:30:46,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1031 transitions. [2022-11-20 10:30:46,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:46,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1031 transitions. [2022-11-20 10:30:46,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,151 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,151 INFO L175 Difference]: Start difference. First operand has 259 places, 242 transitions, 829 flow. Second operand 5 states and 1031 transitions. [2022-11-20 10:30:46,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 274 transitions, 1012 flow [2022-11-20 10:30:46,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 274 transitions, 929 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-20 10:30:46,159 INFO L231 Difference]: Finished difference. Result has 251 places, 245 transitions, 776 flow [2022-11-20 10:30:46,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=776, PETRI_PLACES=251, PETRI_TRANSITIONS=245} [2022-11-20 10:30:46,163 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 42 predicate places. [2022-11-20 10:30:46,163 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 245 transitions, 776 flow [2022-11-20 10:30:46,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,164 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:46,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:30:46,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1210075105, now seen corresponding path program 1 times [2022-11-20 10:30:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:46,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739420488] [2022-11-20 10:30:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:46,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:46,379 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 10:30:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:46,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739420488] [2022-11-20 10:30:46,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739420488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:46,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:46,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:30:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325928700] [2022-11-20 10:30:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:46,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:30:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:30:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:30:46,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 240 [2022-11-20 10:30:46,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 245 transitions, 776 flow. Second operand has 6 states, 6 states have (on average 182.66666666666666) internal successors, (1096), 6 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:46,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:46,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 240 [2022-11-20 10:30:46,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:47,439 INFO L130 PetriNetUnfolder]: 1115/4764 cut-off events. [2022-11-20 10:30:47,439 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2022-11-20 10:30:47,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7536 conditions, 4764 events. 1115/4764 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 42447 event pairs, 905 based on Foata normal form. 26/3740 useless extension candidates. Maximal degree in co-relation 7222. Up to 1757 conditions per place. [2022-11-20 10:30:47,485 INFO L137 encePairwiseOnDemand]: 229/240 looper letters, 73 selfloop transitions, 13 changer transitions 2/254 dead transitions. [2022-11-20 10:30:47,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 254 transitions, 975 flow [2022-11-20 10:30:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:30:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:30:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1307 transitions. [2022-11-20 10:30:47,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7779761904761905 [2022-11-20 10:30:47,490 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1307 transitions. [2022-11-20 10:30:47,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1307 transitions. [2022-11-20 10:30:47,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:47,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1307 transitions. [2022-11-20 10:30:47,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.71428571428572) internal successors, (1307), 7 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:47,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:47,497 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:47,498 INFO L175 Difference]: Start difference. First operand has 251 places, 245 transitions, 776 flow. Second operand 7 states and 1307 transitions. [2022-11-20 10:30:47,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 254 transitions, 975 flow [2022-11-20 10:30:47,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 254 transitions, 973 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:47,506 INFO L231 Difference]: Finished difference. Result has 257 places, 245 transitions, 809 flow [2022-11-20 10:30:47,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=809, PETRI_PLACES=257, PETRI_TRANSITIONS=245} [2022-11-20 10:30:47,507 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 48 predicate places. [2022-11-20 10:30:47,507 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 245 transitions, 809 flow [2022-11-20 10:30:47,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.66666666666666) internal successors, (1096), 6 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:47,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:47,508 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:47,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:30:47,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash -514379656, now seen corresponding path program 1 times [2022-11-20 10:30:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338825247] [2022-11-20 10:30:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:47,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338825247] [2022-11-20 10:30:47,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338825247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:47,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465281883] [2022-11-20 10:30:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:47,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:47,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:47,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:47,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:30:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:30:47,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:30:47,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465281883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:47,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:30:47,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-11-20 10:30:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106278674] [2022-11-20 10:30:47,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:47,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:30:47,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:30:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:30:47,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 240 [2022-11-20 10:30:47,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 245 transitions, 809 flow. Second operand has 6 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:47,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:47,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 240 [2022-11-20 10:30:47,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:49,217 INFO L130 PetriNetUnfolder]: 1121/5176 cut-off events. [2022-11-20 10:30:49,217 INFO L131 PetriNetUnfolder]: For 659/659 co-relation queries the response was YES. [2022-11-20 10:30:49,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8786 conditions, 5176 events. 1121/5176 cut-off events. For 659/659 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 46591 event pairs, 905 based on Foata normal form. 92/4187 useless extension candidates. Maximal degree in co-relation 7875. Up to 1822 conditions per place. [2022-11-20 10:30:49,271 INFO L137 encePairwiseOnDemand]: 228/240 looper letters, 93 selfloop transitions, 21 changer transitions 1/281 dead transitions. [2022-11-20 10:30:49,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 281 transitions, 1200 flow [2022-11-20 10:30:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:30:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:30:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1674 transitions. [2022-11-20 10:30:49,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.775 [2022-11-20 10:30:49,277 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1674 transitions. [2022-11-20 10:30:49,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1674 transitions. [2022-11-20 10:30:49,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:49,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1674 transitions. [2022-11-20 10:30:49,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,289 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,289 INFO L175 Difference]: Start difference. First operand has 257 places, 245 transitions, 809 flow. Second operand 9 states and 1674 transitions. [2022-11-20 10:30:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 281 transitions, 1200 flow [2022-11-20 10:30:49,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 281 transitions, 1168 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:49,302 INFO L231 Difference]: Finished difference. Result has 262 places, 246 transitions, 842 flow [2022-11-20 10:30:49,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=262, PETRI_TRANSITIONS=246} [2022-11-20 10:30:49,303 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 53 predicate places. [2022-11-20 10:30:49,303 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 246 transitions, 842 flow [2022-11-20 10:30:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:49,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:49,304 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:49,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:49,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:30:49,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash 929165066, now seen corresponding path program 1 times [2022-11-20 10:30:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363448815] [2022-11-20 10:30:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:30:49,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363448815] [2022-11-20 10:30:49,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363448815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:49,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579153110] [2022-11-20 10:30:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:49,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:49,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:49,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:30:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:50,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:50,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579153110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:50,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:50,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-20 10:30:50,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987164203] [2022-11-20 10:30:50,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:50,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:30:50,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:30:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:30:50,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 240 [2022-11-20 10:30:50,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 246 transitions, 842 flow. Second operand has 19 states, 19 states have (on average 162.21052631578948) internal successors, (3082), 19 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:50,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:50,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 240 [2022-11-20 10:30:50,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:56,283 INFO L130 PetriNetUnfolder]: 8511/23472 cut-off events. [2022-11-20 10:30:56,283 INFO L131 PetriNetUnfolder]: For 6255/6759 co-relation queries the response was YES. [2022-11-20 10:30:56,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50322 conditions, 23472 events. 8511/23472 cut-off events. For 6255/6759 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 249757 event pairs, 3064 based on Foata normal form. 469/18097 useless extension candidates. Maximal degree in co-relation 42210. Up to 4765 conditions per place. [2022-11-20 10:30:56,534 INFO L137 encePairwiseOnDemand]: 217/240 looper letters, 279 selfloop transitions, 57 changer transitions 2/469 dead transitions. [2022-11-20 10:30:56,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 469 transitions, 2442 flow [2022-11-20 10:30:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:30:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 10:30:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4958 transitions. [2022-11-20 10:30:56,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6886111111111111 [2022-11-20 10:30:56,546 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4958 transitions. [2022-11-20 10:30:56,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4958 transitions. [2022-11-20 10:30:56,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:56,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4958 transitions. [2022-11-20 10:30:56,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 165.26666666666668) internal successors, (4958), 30 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 240.0) internal successors, (7440), 31 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,577 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 240.0) internal successors, (7440), 31 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,578 INFO L175 Difference]: Start difference. First operand has 262 places, 246 transitions, 842 flow. Second operand 30 states and 4958 transitions. [2022-11-20 10:30:56,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 469 transitions, 2442 flow [2022-11-20 10:30:56,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 469 transitions, 2414 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 10:30:56,614 INFO L231 Difference]: Finished difference. Result has 297 places, 270 transitions, 1149 flow [2022-11-20 10:30:56,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1149, PETRI_PLACES=297, PETRI_TRANSITIONS=270} [2022-11-20 10:30:56,617 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 88 predicate places. [2022-11-20 10:30:56,617 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 270 transitions, 1149 flow [2022-11-20 10:30:56,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 162.21052631578948) internal successors, (3082), 19 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:56,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:56,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:56,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:56,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:56,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1005819558, now seen corresponding path program 1 times [2022-11-20 10:30:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:56,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278841640] [2022-11-20 10:30:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:57,034 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 10:30:57,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278841640] [2022-11-20 10:30:57,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278841640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:57,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:57,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:30:57,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638157003] [2022-11-20 10:30:57,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:57,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:57,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:57,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 240 [2022-11-20 10:30:57,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 270 transitions, 1149 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:57,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:57,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 240 [2022-11-20 10:30:57,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:59,732 INFO L130 PetriNetUnfolder]: 2698/10411 cut-off events. [2022-11-20 10:30:59,732 INFO L131 PetriNetUnfolder]: For 12204/12546 co-relation queries the response was YES. [2022-11-20 10:30:59,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24118 conditions, 10411 events. 2698/10411 cut-off events. For 12204/12546 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 106221 event pairs, 871 based on Foata normal form. 432/8050 useless extension candidates. Maximal degree in co-relation 20252. Up to 3262 conditions per place. [2022-11-20 10:30:59,836 INFO L137 encePairwiseOnDemand]: 236/240 looper letters, 25 selfloop transitions, 2 changer transitions 1/277 dead transitions. [2022-11-20 10:30:59,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 277 transitions, 1246 flow [2022-11-20 10:30:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:30:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2022-11-20 10:30:59,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8722222222222222 [2022-11-20 10:30:59,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2022-11-20 10:30:59,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2022-11-20 10:30:59,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:59,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2022-11-20 10:30:59,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:59,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:59,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:59,843 INFO L175 Difference]: Start difference. First operand has 297 places, 270 transitions, 1149 flow. Second operand 3 states and 628 transitions. [2022-11-20 10:30:59,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 277 transitions, 1246 flow [2022-11-20 10:30:59,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 277 transitions, 1179 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-20 10:30:59,871 INFO L231 Difference]: Finished difference. Result has 287 places, 270 transitions, 1093 flow [2022-11-20 10:30:59,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1093, PETRI_PLACES=287, PETRI_TRANSITIONS=270} [2022-11-20 10:30:59,873 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 78 predicate places. [2022-11-20 10:30:59,873 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 270 transitions, 1093 flow [2022-11-20 10:30:59,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:59,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:59,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:30:59,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:30:59,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:30:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 585845300, now seen corresponding path program 1 times [2022-11-20 10:30:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:59,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672958565] [2022-11-20 10:30:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672958565] [2022-11-20 10:31:00,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672958565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950241811] [2022-11-20 10:31:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:00,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:00,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:00,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:00,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:31:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:00,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:31:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:31:00,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:31:00,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950241811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:00,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:31:00,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 10:31:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634580238] [2022-11-20 10:31:00,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:31:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:31:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:31:00,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 240 [2022-11-20 10:31:00,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 270 transitions, 1093 flow. Second operand has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:00,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:00,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 240 [2022-11-20 10:31:00,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:02,358 INFO L130 PetriNetUnfolder]: 1366/8362 cut-off events. [2022-11-20 10:31:02,358 INFO L131 PetriNetUnfolder]: For 8538/8628 co-relation queries the response was YES. [2022-11-20 10:31:02,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 8362 events. 1366/8362 cut-off events. For 8538/8628 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 87690 event pairs, 859 based on Foata normal form. 492/7376 useless extension candidates. Maximal degree in co-relation 17396. Up to 2300 conditions per place. [2022-11-20 10:31:02,439 INFO L137 encePairwiseOnDemand]: 235/240 looper letters, 24 selfloop transitions, 3 changer transitions 0/268 dead transitions. [2022-11-20 10:31:02,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 268 transitions, 1137 flow [2022-11-20 10:31:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:31:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:31:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 814 transitions. [2022-11-20 10:31:02,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-11-20 10:31:02,442 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 814 transitions. [2022-11-20 10:31:02,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 814 transitions. [2022-11-20 10:31:02,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:02,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 814 transitions. [2022-11-20 10:31:02,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:02,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:02,446 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:02,447 INFO L175 Difference]: Start difference. First operand has 287 places, 270 transitions, 1093 flow. Second operand 4 states and 814 transitions. [2022-11-20 10:31:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 268 transitions, 1137 flow [2022-11-20 10:31:02,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 268 transitions, 1128 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-20 10:31:02,471 INFO L231 Difference]: Finished difference. Result has 285 places, 268 transitions, 1080 flow [2022-11-20 10:31:02,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1080, PETRI_PLACES=285, PETRI_TRANSITIONS=268} [2022-11-20 10:31:02,473 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 76 predicate places. [2022-11-20 10:31:02,473 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 268 transitions, 1080 flow [2022-11-20 10:31:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:02,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:02,474 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:31:02,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:02,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:31:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 981335999, now seen corresponding path program 1 times [2022-11-20 10:31:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:02,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901996702] [2022-11-20 10:31:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:02,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:31:02,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901996702] [2022-11-20 10:31:02,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901996702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:02,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:31:02,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:31:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486196951] [2022-11-20 10:31:02,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:31:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:31:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:31:02,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 240 [2022-11-20 10:31:02,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 268 transitions, 1080 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:02,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:02,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 240 [2022-11-20 10:31:02,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:04,255 INFO L130 PetriNetUnfolder]: 1073/6779 cut-off events. [2022-11-20 10:31:04,255 INFO L131 PetriNetUnfolder]: For 6179/6589 co-relation queries the response was YES. [2022-11-20 10:31:04,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13501 conditions, 6779 events. 1073/6779 cut-off events. For 6179/6589 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 67644 event pairs, 420 based on Foata normal form. 132/5742 useless extension candidates. Maximal degree in co-relation 13423. Up to 1816 conditions per place. [2022-11-20 10:31:04,311 INFO L137 encePairwiseOnDemand]: 234/240 looper letters, 17 selfloop transitions, 7 changer transitions 0/269 dead transitions. [2022-11-20 10:31:04,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 269 transitions, 1138 flow [2022-11-20 10:31:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:31:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:31:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2022-11-20 10:31:04,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8555555555555555 [2022-11-20 10:31:04,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2022-11-20 10:31:04,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2022-11-20 10:31:04,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:04,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2022-11-20 10:31:04,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:04,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:04,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:04,320 INFO L175 Difference]: Start difference. First operand has 285 places, 268 transitions, 1080 flow. Second operand 3 states and 616 transitions. [2022-11-20 10:31:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 269 transitions, 1138 flow [2022-11-20 10:31:04,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 269 transitions, 1121 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-20 10:31:04,338 INFO L231 Difference]: Finished difference. Result has 283 places, 267 transitions, 1093 flow [2022-11-20 10:31:04,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1093, PETRI_PLACES=283, PETRI_TRANSITIONS=267} [2022-11-20 10:31:04,340 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 74 predicate places. [2022-11-20 10:31:04,340 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 267 transitions, 1093 flow [2022-11-20 10:31:04,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:04,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:04,341 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:31:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:31:04,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:31:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash 763307404, now seen corresponding path program 1 times [2022-11-20 10:31:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:04,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023733255] [2022-11-20 10:31:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:31:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023733255] [2022-11-20 10:31:04,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023733255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036941641] [2022-11-20 10:31:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:04,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:04,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:31:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:04,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:31:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:31:04,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:31:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036941641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:31:04,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:31:04,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 10:31:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543658976] [2022-11-20 10:31:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:31:04,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:31:04,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:31:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:31:04,668 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 240 [2022-11-20 10:31:04,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 267 transitions, 1093 flow. Second operand has 6 states, 6 states have (on average 197.33333333333334) internal successors, (1184), 6 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:04,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:04,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 240 [2022-11-20 10:31:04,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:07,050 INFO L130 PetriNetUnfolder]: 4301/10257 cut-off events. [2022-11-20 10:31:07,050 INFO L131 PetriNetUnfolder]: For 16664/16664 co-relation queries the response was YES. [2022-11-20 10:31:07,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30636 conditions, 10257 events. 4301/10257 cut-off events. For 16664/16664 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 90899 event pairs, 110 based on Foata normal form. 142/9444 useless extension candidates. Maximal degree in co-relation 30375. Up to 2787 conditions per place. [2022-11-20 10:31:07,139 INFO L137 encePairwiseOnDemand]: 235/240 looper letters, 54 selfloop transitions, 12 changer transitions 0/297 dead transitions. [2022-11-20 10:31:07,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 297 transitions, 1356 flow [2022-11-20 10:31:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:31:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:31:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1418 transitions. [2022-11-20 10:31:07,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.844047619047619 [2022-11-20 10:31:07,142 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1418 transitions. [2022-11-20 10:31:07,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1418 transitions. [2022-11-20 10:31:07,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:07,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1418 transitions. [2022-11-20 10:31:07,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.57142857142858) internal successors, (1418), 7 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:07,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:07,148 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 240.0) internal successors, (1920), 8 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:07,149 INFO L175 Difference]: Start difference. First operand has 283 places, 267 transitions, 1093 flow. Second operand 7 states and 1418 transitions. [2022-11-20 10:31:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 297 transitions, 1356 flow [2022-11-20 10:31:07,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 297 transitions, 1303 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-11-20 10:31:07,209 INFO L231 Difference]: Finished difference. Result has 286 places, 265 transitions, 1074 flow [2022-11-20 10:31:07,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1074, PETRI_PLACES=286, PETRI_TRANSITIONS=265} [2022-11-20 10:31:07,210 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 77 predicate places. [2022-11-20 10:31:07,210 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 265 transitions, 1074 flow [2022-11-20 10:31:07,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.33333333333334) internal successors, (1184), 6 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:07,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:07,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:31:07,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:07,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:31:07,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:31:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1877863937, now seen corresponding path program 1 times [2022-11-20 10:31:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:07,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499790505] [2022-11-20 10:31:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:08,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:08,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499790505] [2022-11-20 10:31:08,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499790505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:08,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315606484] [2022-11-20 10:31:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:08,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:08,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:08,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:08,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:31:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 10:31:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:09,927 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 10:31:10,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:10,719 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 14 treesize of output 16 [2022-11-20 10:31:10,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:10,855 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 14 treesize of output 16 [2022-11-20 10:31:11,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:31:11,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:11,023 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 17 treesize of output 10 [2022-11-20 10:31:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:12,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:12,468 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 10:31:12,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:12,490 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 10:31:12,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-20 10:31:12,513 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 10:31:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:14,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315606484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:14,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:14,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 54 [2022-11-20 10:31:14,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331979892] [2022-11-20 10:31:14,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 10:31:14,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 10:31:14,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2730, Unknown=13, NotChecked=0, Total=2970 [2022-11-20 10:31:14,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 240 [2022-11-20 10:31:14,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 265 transitions, 1074 flow. Second operand has 55 states, 55 states have (on average 120.76363636363637) internal successors, (6642), 55 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:14,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:14,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 240 [2022-11-20 10:31:14,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:31:30,593 INFO L130 PetriNetUnfolder]: 10309/34348 cut-off events. [2022-11-20 10:31:30,593 INFO L131 PetriNetUnfolder]: For 16845/18658 co-relation queries the response was YES. [2022-11-20 10:31:30,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66397 conditions, 34348 events. 10309/34348 cut-off events. For 16845/18658 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 414859 event pairs, 4947 based on Foata normal form. 1060/28733 useless extension candidates. Maximal degree in co-relation 66041. Up to 12711 conditions per place. [2022-11-20 10:31:31,117 INFO L137 encePairwiseOnDemand]: 189/240 looper letters, 212 selfloop transitions, 133 changer transitions 24/473 dead transitions. [2022-11-20 10:31:31,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 473 transitions, 2528 flow [2022-11-20 10:31:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-20 10:31:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-11-20 10:31:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 10835 transitions. [2022-11-20 10:31:31,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016203703703703 [2022-11-20 10:31:31,136 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 10835 transitions. [2022-11-20 10:31:31,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 10835 transitions. [2022-11-20 10:31:31,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:31:31,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 10835 transitions. [2022-11-20 10:31:31,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 120.38888888888889) internal successors, (10835), 90 states have internal predecessors, (10835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:31,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 240.0) internal successors, (21840), 91 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:31,195 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 240.0) internal successors, (21840), 91 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:31,195 INFO L175 Difference]: Start difference. First operand has 286 places, 265 transitions, 1074 flow. Second operand 90 states and 10835 transitions. [2022-11-20 10:31:31,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 473 transitions, 2528 flow [2022-11-20 10:31:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 473 transitions, 2479 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-11-20 10:31:31,292 INFO L231 Difference]: Finished difference. Result has 385 places, 359 transitions, 1790 flow [2022-11-20 10:31:31,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=1790, PETRI_PLACES=385, PETRI_TRANSITIONS=359} [2022-11-20 10:31:31,293 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 176 predicate places. [2022-11-20 10:31:31,294 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 359 transitions, 1790 flow [2022-11-20 10:31:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 120.76363636363637) internal successors, (6642), 55 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:31,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:31:31,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:31:31,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:31,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:31:31,507 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:31:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1128623077, now seen corresponding path program 1 times [2022-11-20 10:31:31,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:31,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571484912] [2022-11-20 10:31:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:31:33,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571484912] [2022-11-20 10:31:33,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571484912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439301093] [2022-11-20 10:31:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:33,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:33,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:33,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:33,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:31:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:33,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 10:31:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:34,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-20 10:31:34,320 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 10:31:35,618 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:31:35,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-20 10:31:35,936 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 10:31:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:36,451 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 10:31:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:36,778 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 10:31:36,934 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:31:36,934 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 10:31:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:36,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:37,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_358 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_358) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2022-11-20 10:31:42,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:42,758 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 34 treesize of output 35 [2022-11-20 10:31:42,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:42,772 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 172 treesize of output 168 [2022-11-20 10:31:42,780 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 152 treesize of output 140 [2022-11-20 10:31:42,787 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 140 treesize of output 116 [2022-11-20 10:31:42,796 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 60 treesize of output 54 [2022-11-20 10:31:43,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:43,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 119 [2022-11-20 10:31:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:31:45,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439301093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:45,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:45,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 25] total 66 [2022-11-20 10:31:45,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103576797] [2022-11-20 10:31:45,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:45,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 10:31:45,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 10:31:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=4020, Unknown=6, NotChecked=128, Total=4422 [2022-11-20 10:31:45,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 240 [2022-11-20 10:31:45,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 359 transitions, 1790 flow. Second operand has 67 states, 67 states have (on average 120.95522388059702) internal successors, (8104), 67 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:31:45,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:31:45,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 240 [2022-11-20 10:31:45,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:32:07,924 INFO L130 PetriNetUnfolder]: 12444/34835 cut-off events. [2022-11-20 10:32:07,924 INFO L131 PetriNetUnfolder]: For 61191/65913 co-relation queries the response was YES. [2022-11-20 10:32:08,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90427 conditions, 34835 events. 12444/34835 cut-off events. For 61191/65913 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 395570 event pairs, 3252 based on Foata normal form. 2029/32304 useless extension candidates. Maximal degree in co-relation 90018. Up to 7112 conditions per place. [2022-11-20 10:32:08,489 INFO L137 encePairwiseOnDemand]: 203/240 looper letters, 356 selfloop transitions, 91 changer transitions 7/564 dead transitions. [2022-11-20 10:32:08,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 564 transitions, 3719 flow [2022-11-20 10:32:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:32:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 10:32:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6096 transitions. [2022-11-20 10:32:08,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2022-11-20 10:32:08,499 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6096 transitions. [2022-11-20 10:32:08,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6096 transitions. [2022-11-20 10:32:08,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:32:08,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6096 transitions. [2022-11-20 10:32:08,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 124.40816326530613) internal successors, (6096), 49 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 240.0) internal successors, (12000), 50 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,532 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 240.0) internal successors, (12000), 50 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:08,532 INFO L175 Difference]: Start difference. First operand has 385 places, 359 transitions, 1790 flow. Second operand 49 states and 6096 transitions. [2022-11-20 10:32:08,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 564 transitions, 3719 flow [2022-11-20 10:32:09,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 564 transitions, 3552 flow, removed 39 selfloop flow, removed 26 redundant places. [2022-11-20 10:32:09,254 INFO L231 Difference]: Finished difference. Result has 412 places, 399 transitions, 2240 flow [2022-11-20 10:32:09,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2240, PETRI_PLACES=412, PETRI_TRANSITIONS=399} [2022-11-20 10:32:09,255 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 203 predicate places. [2022-11-20 10:32:09,255 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 399 transitions, 2240 flow [2022-11-20 10:32:09,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 120.95522388059702) internal successors, (8104), 67 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:09,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:32:09,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:32:09,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:32:09,463 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:32:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -501837287, now seen corresponding path program 2 times [2022-11-20 10:32:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:09,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553110567] [2022-11-20 10:32:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:11,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:11,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553110567] [2022-11-20 10:32:11,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553110567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:11,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252680802] [2022-11-20 10:32:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:11,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:11,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:11,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:11,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:32:11,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:11,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:32:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:11,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-20 10:32:11,677 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 10:32:11,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-11-20 10:32:12,053 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:32:12,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2022-11-20 10:32:12,810 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 10:32:12,886 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 10:32:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:32:12,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:12,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252680802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:12,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:32:12,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [21] total 33 [2022-11-20 10:32:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331874088] [2022-11-20 10:32:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:32:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:32:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:32:12,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 240 [2022-11-20 10:32:12,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 399 transitions, 2240 flow. Second operand has 14 states, 14 states have (on average 156.07142857142858) internal successors, (2185), 14 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:12,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:32:12,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 240 [2022-11-20 10:32:12,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:32:27,992 INFO L130 PetriNetUnfolder]: 20060/51751 cut-off events. [2022-11-20 10:32:27,992 INFO L131 PetriNetUnfolder]: For 146150/149025 co-relation queries the response was YES. [2022-11-20 10:32:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152922 conditions, 51751 events. 20060/51751 cut-off events. For 146150/149025 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 611246 event pairs, 5582 based on Foata normal form. 2287/49335 useless extension candidates. Maximal degree in co-relation 152541. Up to 15358 conditions per place. [2022-11-20 10:32:28,816 INFO L137 encePairwiseOnDemand]: 218/240 looper letters, 163 selfloop transitions, 88 changer transitions 0/464 dead transitions. [2022-11-20 10:32:28,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 464 transitions, 3221 flow [2022-11-20 10:32:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:32:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:32:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2860 transitions. [2022-11-20 10:32:28,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2022-11-20 10:32:28,821 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2860 transitions. [2022-11-20 10:32:28,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2860 transitions. [2022-11-20 10:32:28,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:32:28,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2860 transitions. [2022-11-20 10:32:28,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.88888888888889) internal successors, (2860), 18 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 240.0) internal successors, (4560), 19 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,833 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 240.0) internal successors, (4560), 19 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,834 INFO L175 Difference]: Start difference. First operand has 412 places, 399 transitions, 2240 flow. Second operand 18 states and 2860 transitions. [2022-11-20 10:32:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 464 transitions, 3221 flow [2022-11-20 10:32:31,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 464 transitions, 3105 flow, removed 31 selfloop flow, removed 20 redundant places. [2022-11-20 10:32:31,118 INFO L231 Difference]: Finished difference. Result has 410 places, 411 transitions, 2469 flow [2022-11-20 10:32:31,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2469, PETRI_PLACES=410, PETRI_TRANSITIONS=411} [2022-11-20 10:32:31,119 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 201 predicate places. [2022-11-20 10:32:31,120 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 411 transitions, 2469 flow [2022-11-20 10:32:31,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.07142857142858) internal successors, (2185), 14 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:31,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:32:31,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:32:31,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:31,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:32:31,323 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:32:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1622914141, now seen corresponding path program 1 times [2022-11-20 10:32:31,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:31,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256569917] [2022-11-20 10:32:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:31,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256569917] [2022-11-20 10:32:33,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256569917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098657518] [2022-11-20 10:32:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:33,523 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:33,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:32:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 10:32:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:34,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-20 10:32:34,899 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 10:32:36,589 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:32:36,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-20 10:32:36,931 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 10:32:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:37,534 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 10:32:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:37,921 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 10:32:38,112 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 10:32:38,112 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 10:32:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:38,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:40,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:32:40,452 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 35 treesize of output 36 [2022-11-20 10:32:40,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:32:40,467 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 180 treesize of output 176 [2022-11-20 10:32:40,475 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 160 treesize of output 136 [2022-11-20 10:32:40,483 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 136 treesize of output 124 [2022-11-20 10:32:40,498 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 64 treesize of output 58 [2022-11-20 10:32:41,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:32:41,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 121 [2022-11-20 10:32:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098657518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:44,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 25] total 66 [2022-11-20 10:32:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851779273] [2022-11-20 10:32:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:44,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 10:32:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 10:32:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4136, Unknown=16, NotChecked=0, Total=4422 [2022-11-20 10:32:44,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 240 [2022-11-20 10:32:44,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 411 transitions, 2469 flow. Second operand has 67 states, 67 states have (on average 121.0) internal successors, (8107), 67 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:44,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:32:44,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 240 [2022-11-20 10:32:44,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:11,314 INFO L130 PetriNetUnfolder]: 20989/54561 cut-off events. [2022-11-20 10:33:11,314 INFO L131 PetriNetUnfolder]: For 170776/175389 co-relation queries the response was YES. [2022-11-20 10:33:11,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163026 conditions, 54561 events. 20989/54561 cut-off events. For 170776/175389 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 651748 event pairs, 6158 based on Foata normal form. 2865/51468 useless extension candidates. Maximal degree in co-relation 162575. Up to 16717 conditions per place. [2022-11-20 10:33:12,197 INFO L137 encePairwiseOnDemand]: 201/240 looper letters, 342 selfloop transitions, 106 changer transitions 3/561 dead transitions. [2022-11-20 10:33:12,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 561 transitions, 4257 flow [2022-11-20 10:33:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 10:33:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-20 10:33:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 5696 transitions. [2022-11-20 10:33:12,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5159420289855072 [2022-11-20 10:33:12,206 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 5696 transitions. [2022-11-20 10:33:12,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 5696 transitions. [2022-11-20 10:33:12,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:12,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 5696 transitions. [2022-11-20 10:33:12,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 123.82608695652173) internal successors, (5696), 46 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:12,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 240.0) internal successors, (11280), 47 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:12,231 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 240.0) internal successors, (11280), 47 states have internal predecessors, (11280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:12,231 INFO L175 Difference]: Start difference. First operand has 410 places, 411 transitions, 2469 flow. Second operand 46 states and 5696 transitions. [2022-11-20 10:33:12,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 561 transitions, 4257 flow [2022-11-20 10:33:14,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 561 transitions, 4137 flow, removed 15 selfloop flow, removed 13 redundant places. [2022-11-20 10:33:14,543 INFO L231 Difference]: Finished difference. Result has 446 places, 426 transitions, 2810 flow [2022-11-20 10:33:14,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2810, PETRI_PLACES=446, PETRI_TRANSITIONS=426} [2022-11-20 10:33:14,544 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 237 predicate places. [2022-11-20 10:33:14,544 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 426 transitions, 2810 flow [2022-11-20 10:33:14,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 121.0) internal successors, (8107), 67 states have internal predecessors, (8107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:14,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:14,546 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:33:14,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:33:14,752 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-20 10:33:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -895243786, now seen corresponding path program 2 times [2022-11-20 10:33:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045092453] [2022-11-20 10:33:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:15,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045092453] [2022-11-20 10:33:15,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045092453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665896873] [2022-11-20 10:33:15,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:15,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:15,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:15,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41abeb5f-d13b-472e-bcee-7352d80407cd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:33:15,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:33:15,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:33:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 10:33:15,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 10:33:15,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665896873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:15,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2022-11-20 10:33:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054241680] [2022-11-20 10:33:15,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:33:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:33:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:33:15,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 240 [2022-11-20 10:33:15,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 426 transitions, 2810 flow. Second operand has 16 states, 16 states have (on average 156.375) internal successors, (2502), 16 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:15,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:15,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 240 [2022-11-20 10:33:15,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand