./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/psyco/psyco_abp_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_abp_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 167b835a28653099821c6834c1cc6b8e30303efac27d569b21e43e89592d7586 --- 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-2329fc7 [2022-12-14 06:01:47,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:01:47,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:01:47,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:01:47,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:01:47,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:01:47,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:01:47,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:01:47,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:01:47,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:01:47,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:01:47,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:01:47,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:01:47,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:01:47,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:01:47,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:01:47,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:01:47,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:01:47,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:01:47,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:01:47,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:01:47,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:01:47,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:01:47,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:01:47,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:01:47,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:01:47,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:01:47,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:01:47,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:01:47,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:01:47,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:01:47,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:01:47,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:01:47,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:01:47,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:01:47,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:01:47,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:01:47,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:01:47,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:01:47,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:01:47,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:01:47,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 06:01:47,476 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:01:47,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:01:47,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:01:47,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:01:47,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:01:47,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:01:47,486 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:01:47,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:01:47,486 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:01:47,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:01:47,487 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:01:47,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:01:47,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:01:47,487 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:01:47,487 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:01:47,488 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:01:47,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:01:47,488 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:01:47,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:01:47,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:01:47,489 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:01:47,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:01:47,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:01:47,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:01:47,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:01:47,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:01:47,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:01:47,490 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 06:01:47,491 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:01:47,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:01:47,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:01:47,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:01:47,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:01:47,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:01:47,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:01:47,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:01:47,492 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:01:47,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:01:47,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:01:47,493 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:01:47,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:01:47,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:01:47,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:01:47,493 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_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 167b835a28653099821c6834c1cc6b8e30303efac27d569b21e43e89592d7586 [2022-12-14 06:01:47,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:01:47,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:01:47,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:01:47,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:01:47,705 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:01:47,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/psyco/psyco_abp_1-2.c [2022-12-14 06:01:50,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:01:50,411 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:01:50,412 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/sv-benchmarks/c/psyco/psyco_abp_1-2.c [2022-12-14 06:01:50,418 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/data/8a5e4f45d/791b76ec17d7474d99297d105cc5a9f5/FLAG7d7a61046 [2022-12-14 06:01:50,429 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/data/8a5e4f45d/791b76ec17d7474d99297d105cc5a9f5 [2022-12-14 06:01:50,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:01:50,431 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:01:50,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:01:50,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:01:50,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:01:50,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28248afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50, skipping insertion in model container [2022-12-14 06:01:50,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:01:50,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:01:50,627 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_32844f60-c2a9-4d6b-b478-058a718c171a/sv-benchmarks/c/psyco/psyco_abp_1-2.c[24706,24719] [2022-12-14 06:01:50,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:01:50,637 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:01:50,680 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_32844f60-c2a9-4d6b-b478-058a718c171a/sv-benchmarks/c/psyco/psyco_abp_1-2.c[24706,24719] [2022-12-14 06:01:50,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:01:50,692 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:01:50,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50 WrapperNode [2022-12-14 06:01:50,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:01:50,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:01:50,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:01:50,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:01:50,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,737 INFO L138 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 467 [2022-12-14 06:01:50,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:01:50,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:01:50,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:01:50,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:01:50,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:01:50,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:01:50,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:01:50,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:01:50,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (1/1) ... [2022-12-14 06:01:50,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:01:50,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:50,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:01:50,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:01:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:01:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:01:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:01:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:01:50,891 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:01:50,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:01:51,430 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:01:51,439 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:01:51,439 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:01:51,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:01:51 BoogieIcfgContainer [2022-12-14 06:01:51,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:01:51,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:01:51,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:01:51,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:01:51,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:01:50" (1/3) ... [2022-12-14 06:01:51,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fd2219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:01:51, skipping insertion in model container [2022-12-14 06:01:51,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:50" (2/3) ... [2022-12-14 06:01:51,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fd2219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:01:51, skipping insertion in model container [2022-12-14 06:01:51,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:01:51" (3/3) ... [2022-12-14 06:01:51,447 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-2.c [2022-12-14 06:01:51,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:01:51,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-12-14 06:01:51,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:01:51,504 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=FINITE_AUTOMATA, 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;@66967b5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:01:51,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-14 06:01:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 149 states have (on average 1.9731543624161074) internal successors, (294), 191 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:01:51,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:51,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:51,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash 989774804, now seen corresponding path program 1 times [2022-12-14 06:01:51,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:51,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363121980] [2022-12-14 06:01:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:51,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:51,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:51,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363121980] [2022-12-14 06:01:51,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363121980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:51,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:51,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:01:51,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547537508] [2022-12-14 06:01:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:51,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:01:51,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:01:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:51,692 INFO L87 Difference]: Start difference. First operand has 192 states, 149 states have (on average 1.9731543624161074) internal successors, (294), 191 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:51,786 INFO L93 Difference]: Finished difference Result 386 states and 593 transitions. [2022-12-14 06:01:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:01:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:01:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:51,795 INFO L225 Difference]: With dead ends: 386 [2022-12-14 06:01:51,795 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 06:01:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:51,800 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 4 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:51,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 527 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:01:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 06:01:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-12-14 06:01:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.6910569105691058) internal successors, (208), 164 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 208 transitions. [2022-12-14 06:01:51,829 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 208 transitions. Word has length 9 [2022-12-14 06:01:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:51,830 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 208 transitions. [2022-12-14 06:01:51,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 208 transitions. [2022-12-14 06:01:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:01:51,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:51,831 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:51,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:01:51,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash 995209245, now seen corresponding path program 1 times [2022-12-14 06:01:51,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:51,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681292624] [2022-12-14 06:01:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:51,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:51,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681292624] [2022-12-14 06:01:51,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681292624] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:51,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:51,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:01:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946234390] [2022-12-14 06:01:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:01:51,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:01:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:51,913 INFO L87 Difference]: Start difference. First operand 165 states and 208 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:52,031 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2022-12-14 06:01:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:01:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 06:01:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:52,034 INFO L225 Difference]: With dead ends: 320 [2022-12-14 06:01:52,034 INFO L226 Difference]: Without dead ends: 260 [2022-12-14 06:01:52,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:52,036 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 151 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:52,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 323 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:01:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-14 06:01:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 251. [2022-12-14 06:01:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 209 states have (on average 1.6267942583732058) internal successors, (340), 250 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 340 transitions. [2022-12-14 06:01:52,051 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 340 transitions. Word has length 14 [2022-12-14 06:01:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:52,051 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 340 transitions. [2022-12-14 06:01:52,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 340 transitions. [2022-12-14 06:01:52,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 06:01:52,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:52,052 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:52,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:01:52,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1381620001, now seen corresponding path program 1 times [2022-12-14 06:01:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61584173] [2022-12-14 06:01:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:52,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:52,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61584173] [2022-12-14 06:01:52,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61584173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:52,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:52,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:01:52,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246932658] [2022-12-14 06:01:52,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:52,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:01:52,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:01:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:52,131 INFO L87 Difference]: Start difference. First operand 251 states and 340 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:52,194 INFO L93 Difference]: Finished difference Result 354 states and 486 transitions. [2022-12-14 06:01:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:01:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 06:01:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:52,196 INFO L225 Difference]: With dead ends: 354 [2022-12-14 06:01:52,196 INFO L226 Difference]: Without dead ends: 346 [2022-12-14 06:01:52,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:52,198 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 123 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:52,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 378 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:01:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-12-14 06:01:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2022-12-14 06:01:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 299 states have (on average 1.5785953177257526) internal successors, (472), 340 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 472 transitions. [2022-12-14 06:01:52,210 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 472 transitions. Word has length 16 [2022-12-14 06:01:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:52,210 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 472 transitions. [2022-12-14 06:01:52,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 472 transitions. [2022-12-14 06:01:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:01:52,211 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:52,211 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:52,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:01:52,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash -201360900, now seen corresponding path program 1 times [2022-12-14 06:01:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:52,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363189898] [2022-12-14 06:01:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:01:52,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363189898] [2022-12-14 06:01:52,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363189898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:52,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:52,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:01:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812826154] [2022-12-14 06:01:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:52,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:01:52,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:01:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:52,280 INFO L87 Difference]: Start difference. First operand 341 states and 472 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:52,316 INFO L93 Difference]: Finished difference Result 695 states and 969 transitions. [2022-12-14 06:01:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:01:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 06:01:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:52,318 INFO L225 Difference]: With dead ends: 695 [2022-12-14 06:01:52,318 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 06:01:52,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:52,320 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 39 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:52,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 351 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:01:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 06:01:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2022-12-14 06:01:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 314 states have (on average 1.5509554140127388) internal successors, (487), 355 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 487 transitions. [2022-12-14 06:01:52,330 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 487 transitions. Word has length 24 [2022-12-14 06:01:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:52,331 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 487 transitions. [2022-12-14 06:01:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 487 transitions. [2022-12-14 06:01:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:01:52,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:52,333 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:01:52,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2144880393, now seen corresponding path program 1 times [2022-12-14 06:01:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421888106] [2022-12-14 06:01:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:52,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421888106] [2022-12-14 06:01:52,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421888106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608826917] [2022-12-14 06:01:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:52,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:52,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:52,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:52,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:01:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:52,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:01:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:52,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:01:52,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608826917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:52,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:01:52,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 06:01:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062548708] [2022-12-14 06:01:52,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:52,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:01:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:01:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:01:52,558 INFO L87 Difference]: Start difference. First operand 356 states and 487 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:52,637 INFO L93 Difference]: Finished difference Result 365 states and 493 transitions. [2022-12-14 06:01:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:01:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:01:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:52,640 INFO L225 Difference]: With dead ends: 365 [2022-12-14 06:01:52,640 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 06:01:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:01:52,642 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 346 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:52,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 390 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:01:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 06:01:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 339. [2022-12-14 06:01:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 314 states have (on average 1.4968152866242037) internal successors, (470), 338 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 470 transitions. [2022-12-14 06:01:52,649 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 470 transitions. Word has length 27 [2022-12-14 06:01:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:52,649 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 470 transitions. [2022-12-14 06:01:52,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 470 transitions. [2022-12-14 06:01:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:01:52,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:52,651 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:52,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:01:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:52,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2066781395, now seen corresponding path program 1 times [2022-12-14 06:01:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912947642] [2022-12-14 06:01:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:01:52,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:52,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912947642] [2022-12-14 06:01:52,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912947642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:52,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:52,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:01:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124238100] [2022-12-14 06:01:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:01:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:01:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:52,972 INFO L87 Difference]: Start difference. First operand 339 states and 470 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:53,005 INFO L93 Difference]: Finished difference Result 679 states and 941 transitions. [2022-12-14 06:01:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:01:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 06:01:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:53,007 INFO L225 Difference]: With dead ends: 679 [2022-12-14 06:01:53,007 INFO L226 Difference]: Without dead ends: 339 [2022-12-14 06:01:53,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:01:53,009 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:53,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 369 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:01:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-12-14 06:01:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-12-14 06:01:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 314 states have (on average 1.4872611464968153) internal successors, (467), 338 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 467 transitions. [2022-12-14 06:01:53,018 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 467 transitions. Word has length 28 [2022-12-14 06:01:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:53,018 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 467 transitions. [2022-12-14 06:01:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 467 transitions. [2022-12-14 06:01:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:01:53,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:53,019 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:53,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:01:53,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:01:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2066783061, now seen corresponding path program 1 times [2022-12-14 06:01:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:53,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179560296] [2022-12-14 06:01:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:53,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:53,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179560296] [2022-12-14 06:01:53,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179560296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887456649] [2022-12-14 06:01:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:53,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:53,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:53,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:53,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:01:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:53,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:01:53,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:53,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:53,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887456649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825893675] [2022-12-14 06:01:53,224 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 06:01:53,224 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:53,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:53,230 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:54,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:58,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [825893675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:58,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [3, 3, 3] total 27 [2022-12-14 06:01:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798207997] [2022-12-14 06:01:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 06:01:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 06:01:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:01:58,418 INFO L87 Difference]: Start difference. First operand 339 states and 467 transitions. Second operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:01,738 INFO L93 Difference]: Finished difference Result 727 states and 1003 transitions. [2022-12-14 06:02:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:02:01,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 06:02:01,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:01,739 INFO L225 Difference]: With dead ends: 727 [2022-12-14 06:02:01,739 INFO L226 Difference]: Without dead ends: 386 [2022-12-14 06:02:01,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=320, Invalid=1162, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 06:02:01,740 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 172 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:01,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 764 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 06:02:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-12-14 06:02:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2022-12-14 06:02:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.467966573816156) internal successors, (527), 383 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 527 transitions. [2022-12-14 06:02:01,747 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 527 transitions. Word has length 28 [2022-12-14 06:02:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:01,748 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 527 transitions. [2022-12-14 06:02:01,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 527 transitions. [2022-12-14 06:02:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:02:01,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:01,748 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 06:02:01,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:02:01,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:01,950 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1903641239, now seen corresponding path program 1 times [2022-12-14 06:02:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266157758] [2022-12-14 06:02:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:02,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266157758] [2022-12-14 06:02:02,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266157758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053048880] [2022-12-14 06:02:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:02,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:02,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:02,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:02,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:02:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:02:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:02,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:02,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053048880] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:02,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088321522] [2022-12-14 06:02:02,168 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 06:02:02,168 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:02,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:02,168 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:02,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:02:03,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:02:06,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2088321522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:06,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:02:06,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [3, 3, 3] total 28 [2022-12-14 06:02:06,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680264017] [2022-12-14 06:02:06,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:06,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 06:02:06,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 06:02:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:02:06,622 INFO L87 Difference]: Start difference. First operand 384 states and 527 transitions. Second operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:08,790 INFO L93 Difference]: Finished difference Result 390 states and 533 transitions. [2022-12-14 06:02:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:02:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 06:02:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:08,792 INFO L225 Difference]: With dead ends: 390 [2022-12-14 06:02:08,792 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 06:02:08,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 06:02:08,793 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 80 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:08,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1049 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 06:02:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 06:02:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 387. [2022-12-14 06:02:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 362 states have (on average 1.4640883977900552) internal successors, (530), 386 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 530 transitions. [2022-12-14 06:02:08,801 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 530 transitions. Word has length 30 [2022-12-14 06:02:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:08,802 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 530 transitions. [2022-12-14 06:02:08,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 530 transitions. [2022-12-14 06:02:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 06:02:08,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:08,802 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-12-14 06:02:08,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 06:02:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:09,003 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 674244112, now seen corresponding path program 1 times [2022-12-14 06:02:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:09,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842404519] [2022-12-14 06:02:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:02:09,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:09,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842404519] [2022-12-14 06:02:09,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842404519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:09,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:09,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:02:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866430677] [2022-12-14 06:02:09,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:09,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:09,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:09,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:09,041 INFO L87 Difference]: Start difference. First operand 387 states and 530 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:09,070 INFO L93 Difference]: Finished difference Result 748 states and 1037 transitions. [2022-12-14 06:02:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 06:02:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:09,072 INFO L225 Difference]: With dead ends: 748 [2022-12-14 06:02:09,072 INFO L226 Difference]: Without dead ends: 411 [2022-12-14 06:02:09,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:09,073 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 75 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:09,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 283 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-12-14 06:02:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2022-12-14 06:02:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 386 states have (on average 1.450777202072539) internal successors, (560), 410 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 560 transitions. [2022-12-14 06:02:09,080 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 560 transitions. Word has length 39 [2022-12-14 06:02:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:09,081 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 560 transitions. [2022-12-14 06:02:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 560 transitions. [2022-12-14 06:02:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 06:02:09,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:09,081 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-12-14 06:02:09,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:02:09,082 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 476697526, now seen corresponding path program 1 times [2022-12-14 06:02:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689486580] [2022-12-14 06:02:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:02:09,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689486580] [2022-12-14 06:02:09,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689486580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:09,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:09,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:02:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114515353] [2022-12-14 06:02:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:09,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:09,123 INFO L87 Difference]: Start difference. First operand 411 states and 560 transitions. Second operand has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:09,161 INFO L93 Difference]: Finished difference Result 411 states and 560 transitions. [2022-12-14 06:02:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 06:02:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:09,163 INFO L225 Difference]: With dead ends: 411 [2022-12-14 06:02:09,163 INFO L226 Difference]: Without dead ends: 370 [2022-12-14 06:02:09,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:09,164 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 153 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:09,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 144 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-14 06:02:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2022-12-14 06:02:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 360 states have (on average 1.4416666666666667) internal successors, (519), 369 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 519 transitions. [2022-12-14 06:02:09,181 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 519 transitions. Word has length 42 [2022-12-14 06:02:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:09,181 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 519 transitions. [2022-12-14 06:02:09,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 519 transitions. [2022-12-14 06:02:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 06:02:09,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:09,182 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:09,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:02:09,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash -15938927, now seen corresponding path program 1 times [2022-12-14 06:02:09,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:09,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19219638] [2022-12-14 06:02:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:02:09,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:09,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19219638] [2022-12-14 06:02:09,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19219638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:09,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114566078] [2022-12-14 06:02:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:09,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:09,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:09,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:09,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:02:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:09,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:02:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:02:09,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:02:09,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114566078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817342771] [2022-12-14 06:02:09,408 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-12-14 06:02:09,409 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:09,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:09,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:09,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:02:11,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:02:16,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [817342771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:16,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:02:16,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [3, 3, 3] total 34 [2022-12-14 06:02:16,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088361597] [2022-12-14 06:02:16,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:02:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:02:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 06:02:16,405 INFO L87 Difference]: Start difference. First operand 370 states and 519 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:18,580 INFO L93 Difference]: Finished difference Result 712 states and 1004 transitions. [2022-12-14 06:02:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:02:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 06:02:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:18,582 INFO L225 Difference]: With dead ends: 712 [2022-12-14 06:02:18,582 INFO L226 Difference]: Without dead ends: 392 [2022-12-14 06:02:18,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 06:02:18,583 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 79 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:18,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 702 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 06:02:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-12-14 06:02:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 388. [2022-12-14 06:02:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 378 states have (on average 1.439153439153439) internal successors, (544), 387 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 544 transitions. [2022-12-14 06:02:18,591 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 544 transitions. Word has length 45 [2022-12-14 06:02:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:18,591 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 544 transitions. [2022-12-14 06:02:18,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 544 transitions. [2022-12-14 06:02:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:02:18,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:18,591 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:18,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:02:18,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:02:18,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -494106265, now seen corresponding path program 1 times [2022-12-14 06:02:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:18,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058691397] [2022-12-14 06:02:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:02:18,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058691397] [2022-12-14 06:02:18,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058691397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:18,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:18,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:02:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479408889] [2022-12-14 06:02:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:18,870 INFO L87 Difference]: Start difference. First operand 388 states and 544 transitions. Second operand has 3 states, 2 states have (on average 21.5) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:18,898 INFO L93 Difference]: Finished difference Result 388 states and 544 transitions. [2022-12-14 06:02:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 21.5) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 06:02:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:18,901 INFO L225 Difference]: With dead ends: 388 [2022-12-14 06:02:18,901 INFO L226 Difference]: Without dead ends: 384 [2022-12-14 06:02:18,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:18,902 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:18,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 123 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-12-14 06:02:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-12-14 06:02:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.4232804232804233) internal successors, (538), 383 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 538 transitions. [2022-12-14 06:02:18,911 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 538 transitions. Word has length 46 [2022-12-14 06:02:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:18,911 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 538 transitions. [2022-12-14 06:02:18,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 21.5) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 538 transitions. [2022-12-14 06:02:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:02:18,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:18,911 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2022-12-14 06:02:18,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:02:18,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1862575443, now seen corresponding path program 1 times [2022-12-14 06:02:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:18,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001764771] [2022-12-14 06:02:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:18,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:18,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:18,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001764771] [2022-12-14 06:02:18,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001764771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:18,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344769842] [2022-12-14 06:02:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:18,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:18,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:02:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:02:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:02:19,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:02:19,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344769842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122581938] [2022-12-14 06:02:19,117 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-12-14 06:02:19,118 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:19,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:19,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:19,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:02:21,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:02:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [122581938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:27,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:02:27,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 3, 3] total 35 [2022-12-14 06:02:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189263130] [2022-12-14 06:02:27,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 06:02:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 06:02:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 06:02:27,132 INFO L87 Difference]: Start difference. First operand 384 states and 538 transitions. Second operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:29,282 INFO L93 Difference]: Finished difference Result 391 states and 545 transitions. [2022-12-14 06:02:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 06:02:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 06:02:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:29,283 INFO L225 Difference]: With dead ends: 391 [2022-12-14 06:02:29,283 INFO L226 Difference]: Without dead ends: 390 [2022-12-14 06:02:29,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=309, Invalid=1251, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:02:29,284 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 96 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:29,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 855 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:02:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-14 06:02:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 384. [2022-12-14 06:02:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.4232804232804233) internal successors, (538), 383 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 538 transitions. [2022-12-14 06:02:29,292 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 538 transitions. Word has length 47 [2022-12-14 06:02:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:29,292 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 538 transitions. [2022-12-14 06:02:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 538 transitions. [2022-12-14 06:02:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:02:29,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:29,293 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2022-12-14 06:02:29,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 06:02:29,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:02:29,493 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:29,494 INFO L85 PathProgramCache]: Analyzing trace with hash 162112211, now seen corresponding path program 1 times [2022-12-14 06:02:29,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:29,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257944619] [2022-12-14 06:02:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:29,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:02:29,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257944619] [2022-12-14 06:02:29,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257944619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:29,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:29,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:02:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113377009] [2022-12-14 06:02:29,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:29,545 INFO L87 Difference]: Start difference. First operand 384 states and 538 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:29,569 INFO L93 Difference]: Finished difference Result 724 states and 1016 transitions. [2022-12-14 06:02:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 06:02:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:29,570 INFO L225 Difference]: With dead ends: 724 [2022-12-14 06:02:29,570 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 06:02:29,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:29,571 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 29 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:29,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 235 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 06:02:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-12-14 06:02:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.4054726368159205) internal successors, (565), 407 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 565 transitions. [2022-12-14 06:02:29,580 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 565 transitions. Word has length 61 [2022-12-14 06:02:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:29,580 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 565 transitions. [2022-12-14 06:02:29,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 565 transitions. [2022-12-14 06:02:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 06:02:29,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:29,581 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2022-12-14 06:02:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:02:29,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash -64515831, now seen corresponding path program 1 times [2022-12-14 06:02:29,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:29,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563768438] [2022-12-14 06:02:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:29,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:02:29,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:29,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563768438] [2022-12-14 06:02:29,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563768438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:29,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:29,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:02:29,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385918610] [2022-12-14 06:02:29,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:29,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:29,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:29,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:29,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:29,616 INFO L87 Difference]: Start difference. First operand 408 states and 565 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:29,627 INFO L93 Difference]: Finished difference Result 751 states and 1043 transitions. [2022-12-14 06:02:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:29,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-14 06:02:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:29,628 INFO L225 Difference]: With dead ends: 751 [2022-12-14 06:02:29,628 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 06:02:29,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:29,630 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:29,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 06:02:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-12-14 06:02:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.3980099502487562) internal successors, (562), 407 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 562 transitions. [2022-12-14 06:02:29,639 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 562 transitions. Word has length 65 [2022-12-14 06:02:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:29,639 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 562 transitions. [2022-12-14 06:02:29,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 562 transitions. [2022-12-14 06:02:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 06:02:29,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:29,640 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2022-12-14 06:02:29,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:02:29,640 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1820523387, now seen corresponding path program 1 times [2022-12-14 06:02:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:29,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805987602] [2022-12-14 06:02:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:02:29,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805987602] [2022-12-14 06:02:29,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805987602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429124711] [2022-12-14 06:02:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:29,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:29,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:29,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:02:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:02:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:02:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:02:29,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429124711] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153045943] [2022-12-14 06:02:29,902 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:02:29,902 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:29,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:29,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:29,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:02:31,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:02:37,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15693#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483648) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (or (= |ULTIMATE.start_main_~P9~0#1| (ite (and (< |ULTIMATE.start_main_~this_expect~0#1| 1) (not (= 0 (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2)))) (+ (- 2) (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2)) (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2))) (not (= |ULTIMATE.start_main_~P9~0#1| 1))) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~this_expect~0#1|) (= ~m_Protocol~0 1) (= 7 |ULTIMATE.start_main_~method_id~0#1|) (< (+ |ULTIMATE.start_main_~this_buffer_empty~0#1| 2147483646) 0) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= |ULTIMATE.start_main_~P1~0#1| 1) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:02:37,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:02:37,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:02:37,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-12-14 06:02:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838325035] [2022-12-14 06:02:37,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:02:37,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:02:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:02:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 06:02:37,864 INFO L87 Difference]: Start difference. First operand 408 states and 562 transitions. Second operand has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:37,913 INFO L93 Difference]: Finished difference Result 418 states and 573 transitions. [2022-12-14 06:02:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:02:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 06:02:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:37,916 INFO L225 Difference]: With dead ends: 418 [2022-12-14 06:02:37,916 INFO L226 Difference]: Without dead ends: 414 [2022-12-14 06:02:37,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=306, Invalid=2664, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 06:02:37,918 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 366 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:37,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 340 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-12-14 06:02:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 293. [2022-12-14 06:02:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.3814432989690721) internal successors, (402), 292 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 402 transitions. [2022-12-14 06:02:37,926 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 402 transitions. Word has length 67 [2022-12-14 06:02:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:37,926 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 402 transitions. [2022-12-14 06:02:37,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 402 transitions. [2022-12-14 06:02:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 06:02:37,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:37,927 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 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] [2022-12-14 06:02:37,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 06:02:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:38,130 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash -983309052, now seen corresponding path program 1 times [2022-12-14 06:02:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:38,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217124602] [2022-12-14 06:02:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:02:38,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:38,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217124602] [2022-12-14 06:02:38,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217124602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:38,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289296445] [2022-12-14 06:02:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:38,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:38,249 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:38,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:02:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:38,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:02:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:02:38,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:02:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289296445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550325712] [2022-12-14 06:02:38,456 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:02:38,456 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:38,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:38,457 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:38,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:02:43,583 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:02:54,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16955#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483648) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= ~m_Protocol~0 1) (= 3 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P1~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) (ite (and (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (+ (- 2) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (mod |ULTIMATE.start_main_~this_expect~0#1| 2))) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (= 2 |ULTIMATE.start_main_~method_id~0#1|) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:02:54,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:02:54,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:02:54,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-14 06:02:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466842947] [2022-12-14 06:02:54,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:02:54,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:02:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:02:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:02:54,098 INFO L87 Difference]: Start difference. First operand 293 states and 402 transitions. Second operand has 9 states, 8 states have (on average 17.625) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:54,225 INFO L93 Difference]: Finished difference Result 883 states and 1221 transitions. [2022-12-14 06:02:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:02:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 17.625) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-14 06:02:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:54,230 INFO L225 Difference]: With dead ends: 883 [2022-12-14 06:02:54,230 INFO L226 Difference]: Without dead ends: 881 [2022-12-14 06:02:54,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:02:54,232 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1072 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:54,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 1013 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-12-14 06:02:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 848. [2022-12-14 06:02:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 846 states have (on average 1.3853427895981087) internal successors, (1172), 847 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1172 transitions. [2022-12-14 06:02:54,245 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1172 transitions. Word has length 75 [2022-12-14 06:02:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:54,245 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1172 transitions. [2022-12-14 06:02:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 17.625) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1172 transitions. [2022-12-14 06:02:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 06:02:54,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:54,247 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:54,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:02:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:02:54,449 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 773058790, now seen corresponding path program 2 times [2022-12-14 06:02:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327544704] [2022-12-14 06:02:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 26 proven. 432 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:02:54,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327544704] [2022-12-14 06:02:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327544704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992295013] [2022-12-14 06:02:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:02:54,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:54,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:54,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:02:54,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:02:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:02:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:02:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-12-14 06:02:54,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:02:54,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992295013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:54,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:02:54,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-12-14 06:02:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062121430] [2022-12-14 06:02:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:02:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:02:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:02:54,957 INFO L87 Difference]: Start difference. First operand 848 states and 1172 transitions. Second operand has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:55,083 INFO L93 Difference]: Finished difference Result 868 states and 1193 transitions. [2022-12-14 06:02:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:02:55,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-12-14 06:02:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:55,088 INFO L225 Difference]: With dead ends: 868 [2022-12-14 06:02:55,088 INFO L226 Difference]: Without dead ends: 867 [2022-12-14 06:02:55,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:02:55,089 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 229 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:55,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 476 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-12-14 06:02:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 844. [2022-12-14 06:02:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.3855278766310795) internal successors, (1168), 843 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1168 transitions. [2022-12-14 06:02:55,105 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1168 transitions. Word has length 195 [2022-12-14 06:02:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:55,105 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1168 transitions. [2022-12-14 06:02:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1168 transitions. [2022-12-14 06:02:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-14 06:02:55,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:55,107 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 10, 10, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:55,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 06:02:55,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:02:55,308 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:55,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1310286617, now seen corresponding path program 1 times [2022-12-14 06:02:55,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:55,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810911048] [2022-12-14 06:02:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-12-14 06:02:55,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:55,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810911048] [2022-12-14 06:02:55,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810911048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:55,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:55,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:02:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116457422] [2022-12-14 06:02:55,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:55,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:55,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:55,491 INFO L87 Difference]: Start difference. First operand 844 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:55,516 INFO L93 Difference]: Finished difference Result 1265 states and 1738 transitions. [2022-12-14 06:02:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:55,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2022-12-14 06:02:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:55,517 INFO L225 Difference]: With dead ends: 1265 [2022-12-14 06:02:55,517 INFO L226 Difference]: Without dead ends: 489 [2022-12-14 06:02:55,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:55,518 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 20 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:55,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-12-14 06:02:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 443. [2022-12-14 06:02:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.332579185520362) internal successors, (589), 442 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 589 transitions. [2022-12-14 06:02:55,528 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 589 transitions. Word has length 201 [2022-12-14 06:02:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:55,529 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 589 transitions. [2022-12-14 06:02:55,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 589 transitions. [2022-12-14 06:02:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 06:02:55,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:55,530 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 06:02:55,530 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1796246306, now seen corresponding path program 2 times [2022-12-14 06:02:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829797754] [2022-12-14 06:02:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-12-14 06:02:55,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829797754] [2022-12-14 06:02:55,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829797754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:55,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:55,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:02:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067739347] [2022-12-14 06:02:55,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:55,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:02:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:02:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:55,606 INFO L87 Difference]: Start difference. First operand 443 states and 589 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:55,628 INFO L93 Difference]: Finished difference Result 649 states and 863 transitions. [2022-12-14 06:02:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:02:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-12-14 06:02:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:55,630 INFO L225 Difference]: With dead ends: 649 [2022-12-14 06:02:55,630 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 06:02:55,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:02:55,631 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 20 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:55,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:02:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 06:02:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-12-14 06:02:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.3170028818443804) internal successors, (457), 347 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 457 transitions. [2022-12-14 06:02:55,644 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 457 transitions. Word has length 209 [2022-12-14 06:02:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:55,644 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 457 transitions. [2022-12-14 06:02:55,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 457 transitions. [2022-12-14 06:02:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-12-14 06:02:55,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:55,647 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:55,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 06:02:55,647 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:02:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash -770538396, now seen corresponding path program 3 times [2022-12-14 06:02:55,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:55,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590808449] [2022-12-14 06:02:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:55,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 30 proven. 609 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:02:56,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:56,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590808449] [2022-12-14 06:02:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590808449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196223452] [2022-12-14 06:02:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:02:56,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:56,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:56,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:56,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:02:56,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:02:56,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:02:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 06:02:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 30 proven. 609 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:02:56,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 30 proven. 609 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:02:56,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196223452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512713244] [2022-12-14 06:02:56,632 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:02:56,632 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:56,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:56,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:56,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:03:08,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:03:14,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25528#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= ~m_Protocol~0 1) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:03:14,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:03:14,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:03:14,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-14 06:03:14,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160333273] [2022-12-14 06:03:14,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:03:14,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 06:03:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 06:03:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=3813, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 06:03:14,512 INFO L87 Difference]: Start difference. First operand 348 states and 457 transitions. Second operand has 19 states, 18 states have (on average 22.72222222222222) internal successors, (409), 19 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:14,654 INFO L93 Difference]: Finished difference Result 809 states and 1067 transitions. [2022-12-14 06:03:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:03:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 22.72222222222222) internal successors, (409), 19 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-12-14 06:03:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:14,656 INFO L225 Difference]: With dead ends: 809 [2022-12-14 06:03:14,656 INFO L226 Difference]: Without dead ends: 808 [2022-12-14 06:03:14,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 624 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=477, Invalid=3813, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 06:03:14,658 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 972 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:14,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1485 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-12-14 06:03:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-12-14 06:03:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.3159851301115242) internal successors, (1062), 807 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1062 transitions. [2022-12-14 06:03:14,680 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1062 transitions. Word has length 225 [2022-12-14 06:03:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:14,681 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1062 transitions. [2022-12-14 06:03:14,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 22.72222222222222) internal successors, (409), 19 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1062 transitions. [2022-12-14 06:03:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-12-14 06:03:14,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:14,692 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 26, 26, 17, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:14,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:03:14,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:03:14,894 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:03:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash -602037223, now seen corresponding path program 4 times [2022-12-14 06:03:14,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:14,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402735708] [2022-12-14 06:03:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:14,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3953 backedges. 70 proven. 3814 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 06:03:16,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402735708] [2022-12-14 06:03:16,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402735708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:03:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172461559] [2022-12-14 06:03:16,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:03:16,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:03:16,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:03:16,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:03:16,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:03:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 06:03:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:03:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3953 backedges. 70 proven. 3814 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 06:03:17,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:03:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3953 backedges. 70 proven. 3814 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 06:03:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172461559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:03:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330141157] [2022-12-14 06:03:17,797 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:03:17,797 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:03:17,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:03:17,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:03:17,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:03:25,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:03:38,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30465#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= ~m_Protocol~0 1) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~this_buffer_empty~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:03:38,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:03:38,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:03:38,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2022-12-14 06:03:38,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409512072] [2022-12-14 06:03:38,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:03:38,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 06:03:38,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 06:03:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=6182, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 06:03:38,169 INFO L87 Difference]: Start difference. First operand 808 states and 1062 transitions. Second operand has 39 states, 38 states have (on average 24.973684210526315) internal successors, (949), 39 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:38,717 INFO L93 Difference]: Finished difference Result 1729 states and 2282 transitions. [2022-12-14 06:03:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 06:03:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 24.973684210526315) internal successors, (949), 39 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 525 [2022-12-14 06:03:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:38,724 INFO L225 Difference]: With dead ends: 1729 [2022-12-14 06:03:38,725 INFO L226 Difference]: Without dead ends: 1728 [2022-12-14 06:03:38,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1609 GetRequests, 1515 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1128, Invalid=6182, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 06:03:38,726 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 3993 mSDsluCounter, 2787 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3993 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:38,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3993 Valid, 2891 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:03:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-12-14 06:03:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1728. [2022-12-14 06:03:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.3155761436016213) internal successors, (2272), 1727 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2272 transitions. [2022-12-14 06:03:38,750 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2272 transitions. Word has length 525 [2022-12-14 06:03:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:38,751 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2272 transitions. [2022-12-14 06:03:38,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 24.973684210526315) internal successors, (949), 39 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2272 transitions. [2022-12-14 06:03:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2022-12-14 06:03:38,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:38,780 INFO L195 NwaCegarLoop]: trace histogram [76, 75, 56, 56, 37, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:38,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:03:38,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:03:38,980 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:03:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash 852644099, now seen corresponding path program 5 times [2022-12-14 06:03:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:38,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563040491] [2022-12-14 06:03:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:38,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18773 backedges. 150 proven. 18474 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-12-14 06:03:46,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:46,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563040491] [2022-12-14 06:03:46,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563040491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:03:46,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832272969] [2022-12-14 06:03:46,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:03:46,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:03:46,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:03:46,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:03:46,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:03:47,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-12-14 06:03:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:03:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 5344 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 06:03:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:03:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18773 backedges. 150 proven. 18474 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-12-14 06:03:48,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:03:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18773 backedges. 150 proven. 18474 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-12-14 06:03:50,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832272969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:03:50,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088013902] [2022-12-14 06:03:50,064 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:03:50,065 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:03:50,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:03:50,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:03:50,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:03:53,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:04:02,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40982#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= ~m_Protocol~0 1) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (ite (and (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (+ (- 2) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)))) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~this_buffer_empty~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:04:02,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:04:02,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:04:02,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 78 [2022-12-14 06:04:02,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188078585] [2022-12-14 06:04:02,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:04:02,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 06:04:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 06:04:02,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3633, Invalid=12117, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 06:04:02,319 INFO L87 Difference]: Start difference. First operand 1728 states and 2272 transitions. Second operand has 79 states, 78 states have (on average 26.012820512820515) internal successors, (2029), 79 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:05,875 INFO L93 Difference]: Finished difference Result 3569 states and 4712 transitions. [2022-12-14 06:04:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-14 06:04:05,876 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 26.012820512820515) internal successors, (2029), 79 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1125 [2022-12-14 06:04:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:05,884 INFO L225 Difference]: With dead ends: 3569 [2022-12-14 06:04:05,884 INFO L226 Difference]: Without dead ends: 3568 [2022-12-14 06:04:05,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3449 GetRequests, 3324 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6541 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3633, Invalid=12117, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 06:04:05,885 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 8041 mSDsluCounter, 5783 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8041 SdHoareTripleChecker+Valid, 5887 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:05,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8041 Valid, 5887 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:04:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-12-14 06:04:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3568. [2022-12-14 06:04:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 1.3153910849453323) internal successors, (4692), 3567 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 4692 transitions. [2022-12-14 06:04:05,932 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 4692 transitions. Word has length 1125 [2022-12-14 06:04:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:05,933 INFO L495 AbstractCegarLoop]: Abstraction has 3568 states and 4692 transitions. [2022-12-14 06:04:05,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 26.012820512820515) internal successors, (2029), 79 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 4692 transitions. [2022-12-14 06:04:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2326 [2022-12-14 06:04:05,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:05,958 INFO L195 NwaCegarLoop]: trace histogram [156, 155, 116, 116, 77, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:04:05,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:04:06,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 06:04:06,159 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:04:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1924112169, now seen corresponding path program 6 times [2022-12-14 06:04:06,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:06,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815655621] [2022-12-14 06:04:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 81413 backedges. 310 proven. 80794 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-12-14 06:04:47,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815655621] [2022-12-14 06:04:47,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815655621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:04:47,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615828032] [2022-12-14 06:04:47,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:04:47,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:04:47,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:04:47,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:04:49,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:04:49,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:04:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 10964 conjuncts, 156 conjunts are in the unsatisfiable core [2022-12-14 06:04:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:04:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 81413 backedges. 310 proven. 80794 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-12-14 06:04:51,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:04:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81413 backedges. 310 proven. 80794 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-12-14 06:04:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615828032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:04:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007062500] [2022-12-14 06:04:57,746 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:04:57,746 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:04:57,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:04:57,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:04:57,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:05:05,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:05:26,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62659#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= ~m_Protocol~0 1) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:05:26,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:05:26,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:05:26,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 158 [2022-12-14 06:05:26,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677582595] [2022-12-14 06:05:26,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:26,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-12-14 06:05:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-12-14 06:05:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13434, Invalid=28796, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 06:05:26,336 INFO L87 Difference]: Start difference. First operand 3568 states and 4692 transitions. Second operand has 159 states, 158 states have (on average 26.5126582278481) internal successors, (4189), 159 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:59,572 INFO L93 Difference]: Finished difference Result 7249 states and 9572 transitions. [2022-12-14 06:05:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-14 06:05:59,575 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 158 states have (on average 26.5126582278481) internal successors, (4189), 159 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2325 [2022-12-14 06:05:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:59,589 INFO L225 Difference]: With dead ends: 7249 [2022-12-14 06:05:59,589 INFO L226 Difference]: Without dead ends: 7248 [2022-12-14 06:05:59,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7129 GetRequests, 6885 SyntacticMatches, 40 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22130 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=13434, Invalid=28796, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 06:05:59,592 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 18601 mSDsluCounter, 11858 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18601 SdHoareTripleChecker+Valid, 11962 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:59,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18601 Valid, 11962 Invalid, 1457 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:05:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2022-12-14 06:05:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 7248. [2022-12-14 06:05:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 1.31530288395198) internal successors, (9532), 7247 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 9532 transitions. [2022-12-14 06:05:59,681 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 9532 transitions. Word has length 2325 [2022-12-14 06:05:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:59,683 INFO L495 AbstractCegarLoop]: Abstraction has 7248 states and 9532 transitions. [2022-12-14 06:05:59,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 158 states have (on average 26.5126582278481) internal successors, (4189), 159 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 9532 transitions. [2022-12-14 06:05:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4726 [2022-12-14 06:05:59,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:59,797 INFO L195 NwaCegarLoop]: trace histogram [316, 315, 236, 236, 157, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:59,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 06:05:59,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 06:05:59,998 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-12-14 06:05:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1804117889, now seen corresponding path program 7 times [2022-12-14 06:05:59,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:59,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107363592] [2022-12-14 06:05:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:59,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:10:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 338693 backedges. 630 proven. 337434 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2022-12-14 06:10:40,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:10:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107363592] [2022-12-14 06:10:40,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107363592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:10:40,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489458019] [2022-12-14 06:10:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:10:40,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:10:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:10:40,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:10:40,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32844f60-c2a9-4d6b-b478-058a718c171a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:10:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:10:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 22204 conjuncts, 316 conjunts are in the unsatisfiable core [2022-12-14 06:10:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:10:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 338693 backedges. 630 proven. 337434 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2022-12-14 06:10:47,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:11:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 338693 backedges. 630 proven. 337434 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2022-12-14 06:11:10,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489458019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:11:10,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834064796] [2022-12-14 06:11:10,700 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 06:11:10,700 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:11:10,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:11:10,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:11:10,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:11:18,280 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:12:06,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '106656#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (= ~m_Protocol~0 1) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-12-14 06:12:06,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:12:06,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:12:06,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159, 159] total 318 [2022-12-14 06:12:06,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161545727] [2022-12-14 06:12:06,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:12:06,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 319 states [2022-12-14 06:12:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:12:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 319 interpolants. [2022-12-14 06:12:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52234, Invalid=81356, Unknown=0, NotChecked=0, Total=133590 [2022-12-14 06:12:06,371 INFO L87 Difference]: Start difference. First operand 7248 states and 9532 transitions. Second operand has 319 states, 318 states have (on average 26.757861635220127) internal successors, (8509), 319 states have internal predecessors, (8509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)