./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/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_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 --- 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 12:46:51,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:46:51,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:46:51,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:46:51,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:46:51,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:46:51,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:46:51,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:46:51,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:46:51,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:46:51,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:46:51,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:46:51,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:46:51,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:46:51,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:46:51,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:46:51,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:46:51,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:46:51,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:46:51,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:46:51,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:46:51,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:46:51,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:46:51,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:46:51,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:46:51,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:46:51,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:46:51,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:46:51,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:46:51,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:46:51,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:46:51,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:46:51,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:46:51,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:46:51,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:46:51,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:46:51,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:46:51,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:46:51,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:46:51,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:46:51,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:46:51,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:46:51,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:46:51,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:46:51,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:46:51,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:46:51,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:46:51,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:46:51,672 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:46:51,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:46:51,673 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:46:51,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:46:51,673 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:46:51,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:46:51,673 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:46:51,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:46:51,674 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:46:51,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:46:51,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:46:51,674 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:46:51,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:46:51,675 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:46:51,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:46:51,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:46:51,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:46:51,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:46:51,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:46:51,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:46:51,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:46:51,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:46:51,677 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:46:51,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:46:51,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:46:51,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:46:51,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:46:51,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:46:51,678 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:46:51,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:46:51,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:46:51,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:46:51,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:46:51,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:46:51,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:46:51,679 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_d040455a-896c-4bd0-9beb-64a56df875e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 [2022-12-14 12:46:51,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:46:51,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:46:51,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:46:51,893 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:46:51,893 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:46:51,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2022-12-14 12:46:54,484 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:46:54,629 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:46:54,629 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2022-12-14 12:46:54,636 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/data/515d5450d/1347cecd56a84c22bf4a8fb45b5feac7/FLAG83e0ae05b [2022-12-14 12:46:54,649 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/data/515d5450d/1347cecd56a84c22bf4a8fb45b5feac7 [2022-12-14 12:46:54,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:46:54,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:46:54,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:46:54,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:46:54,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:46:54,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:54,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4151e3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54, skipping insertion in model container [2022-12-14 12:46:54,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:54,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:46:54,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:46:54,827 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_d040455a-896c-4bd0-9beb-64a56df875e8/sv-benchmarks/c/systemc/token_ring.05.cil-1.c[671,684] [2022-12-14 12:46:54,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:46:54,911 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:46:54,921 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_d040455a-896c-4bd0-9beb-64a56df875e8/sv-benchmarks/c/systemc/token_ring.05.cil-1.c[671,684] [2022-12-14 12:46:54,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:46:54,974 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:46:54,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54 WrapperNode [2022-12-14 12:46:54,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:46:54,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:46:54,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:46:54,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:46:54,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:54,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,021 INFO L138 Inliner]: procedures = 38, calls = 46, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 447 [2022-12-14 12:46:55,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:46:55,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:46:55,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:46:55,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:46:55,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:46:55,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:46:55,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:46:55,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:46:55,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (1/1) ... [2022-12-14 12:46:55,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:46:55,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:55,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:46:55,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:46:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:46:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 12:46:55,096 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 12:46:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 12:46:55,096 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 12:46:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:46:55,096 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:46:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 12:46:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 12:46:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 12:46:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 12:46:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:46:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 12:46:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 12:46:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:46:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:46:55,173 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:46:55,175 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:46:55,572 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:46:55,740 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:46:55,740 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-14 12:46:55,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:46:55 BoogieIcfgContainer [2022-12-14 12:46:55,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:46:55,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:46:55,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:46:55,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:46:55,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:46:54" (1/3) ... [2022-12-14 12:46:55,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68891fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:46:55, skipping insertion in model container [2022-12-14 12:46:55,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:46:54" (2/3) ... [2022-12-14 12:46:55,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68891fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:46:55, skipping insertion in model container [2022-12-14 12:46:55,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:46:55" (3/3) ... [2022-12-14 12:46:55,750 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-1.c [2022-12-14 12:46:55,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:46:55,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:46:55,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:46:55,812 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;@f141fe9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:46:55,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:46:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 86 states have internal predecessors, (128), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 12:46:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:46:55,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:55,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:55,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash 405242992, now seen corresponding path program 1 times [2022-12-14 12:46:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:55,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60187427] [2022-12-14 12:46:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:55,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:56,115 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 12:46:56,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60187427] [2022-12-14 12:46:56,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60187427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:56,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:56,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:46:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063671104] [2022-12-14 12:46:56,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:46:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:56,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:46:56,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:46:56,154 INFO L87 Difference]: Start difference. First operand has 111 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 86 states have internal predecessors, (128), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:46:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:56,418 INFO L93 Difference]: Finished difference Result 317 states and 483 transitions. [2022-12-14 12:46:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:46:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-12-14 12:46:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:56,429 INFO L225 Difference]: With dead ends: 317 [2022-12-14 12:46:56,429 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 12:46:56,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:46:56,436 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 281 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:56,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 418 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:46:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 12:46:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-12-14 12:46:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 159 states have (on average 1.4591194968553458) internal successors, (232), 161 states have internal predecessors, (232), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 12:46:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 300 transitions. [2022-12-14 12:46:56,496 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 300 transitions. Word has length 45 [2022-12-14 12:46:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:56,496 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 300 transitions. [2022-12-14 12:46:56,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:46:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 300 transitions. [2022-12-14 12:46:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:46:56,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:56,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:56,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:46:56,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:56,502 INFO L85 PathProgramCache]: Analyzing trace with hash 210884027, now seen corresponding path program 1 times [2022-12-14 12:46:56,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:56,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892155908] [2022-12-14 12:46:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:56,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:46:56,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892155908] [2022-12-14 12:46:56,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892155908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385317858] [2022-12-14 12:46:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:56,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:56,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:56,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:46:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:46:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:46:56,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385317858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:56,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:46:56,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 12:46:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37562136] [2022-12-14 12:46:56,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:56,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:56,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:46:56,843 INFO L87 Difference]: Start difference. First operand 206 states and 300 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:46:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:56,939 INFO L93 Difference]: Finished difference Result 601 states and 889 transitions. [2022-12-14 12:46:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2022-12-14 12:46:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:56,943 INFO L225 Difference]: With dead ends: 601 [2022-12-14 12:46:56,943 INFO L226 Difference]: Without dead ends: 400 [2022-12-14 12:46:56,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:46:56,945 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 133 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:56,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 290 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-12-14 12:46:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2022-12-14 12:46:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 309 states have (on average 1.4530744336569579) internal successors, (449), 312 states have internal predecessors, (449), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-12-14 12:46:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 573 transitions. [2022-12-14 12:46:56,977 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 573 transitions. Word has length 86 [2022-12-14 12:46:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:56,977 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 573 transitions. [2022-12-14 12:46:56,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:46:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 573 transitions. [2022-12-14 12:46:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:46:56,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:56,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:56,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:57,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash 576907325, now seen corresponding path program 1 times [2022-12-14 12:46:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:57,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199811391] [2022-12-14 12:46:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:57,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:46:57,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199811391] [2022-12-14 12:46:57,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199811391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261252003] [2022-12-14 12:46:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:57,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:57,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:57,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:46:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:57,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:46:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:46:57,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:57,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261252003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:57,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:46:57,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 12:46:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524998973] [2022-12-14 12:46:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:46:57,564 INFO L87 Difference]: Start difference. First operand 396 states and 573 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:46:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:57,678 INFO L93 Difference]: Finished difference Result 1165 states and 1712 transitions. [2022-12-14 12:46:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2022-12-14 12:46:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:57,684 INFO L225 Difference]: With dead ends: 1165 [2022-12-14 12:46:57,684 INFO L226 Difference]: Without dead ends: 774 [2022-12-14 12:46:57,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:46:57,688 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 136 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:57,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 265 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-14 12:46:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 768. [2022-12-14 12:46:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 603 states have (on average 1.4444444444444444) internal successors, (871), 608 states have internal predecessors, (871), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 12:46:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1103 transitions. [2022-12-14 12:46:57,748 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1103 transitions. Word has length 86 [2022-12-14 12:46:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:57,748 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1103 transitions. [2022-12-14 12:46:57,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:46:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1103 transitions. [2022-12-14 12:46:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:46:57,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:57,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:57,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:46:57,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:57,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -144986501, now seen corresponding path program 1 times [2022-12-14 12:46:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:57,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340064139] [2022-12-14 12:46:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:46:58,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340064139] [2022-12-14 12:46:58,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340064139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:58,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304989608] [2022-12-14 12:46:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:58,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:58,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:58,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:46:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:58,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:46:58,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:46:58,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:58,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304989608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:58,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:46:58,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 12:46:58,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832051459] [2022-12-14 12:46:58,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:58,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:58,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:46:58,266 INFO L87 Difference]: Start difference. First operand 768 states and 1103 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:46:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:58,388 INFO L93 Difference]: Finished difference Result 2269 states and 3308 transitions. [2022-12-14 12:46:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:58,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2022-12-14 12:46:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:58,394 INFO L225 Difference]: With dead ends: 2269 [2022-12-14 12:46:58,394 INFO L226 Difference]: Without dead ends: 1506 [2022-12-14 12:46:58,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:46:58,397 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:58,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 265 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-12-14 12:46:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1496. [2022-12-14 12:46:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1179 states have (on average 1.4342663273960985) internal successors, (1691), 1188 states have internal predecessors, (1691), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-12-14 12:46:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2131 transitions. [2022-12-14 12:46:58,453 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2131 transitions. Word has length 86 [2022-12-14 12:46:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:58,453 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2131 transitions. [2022-12-14 12:46:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:46:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2131 transitions. [2022-12-14 12:46:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:46:58,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:58,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:58,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:46:58,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 12:46:58,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1174058371, now seen corresponding path program 1 times [2022-12-14 12:46:58,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:58,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773275414] [2022-12-14 12:46:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:58,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:46:58,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773275414] [2022-12-14 12:46:58,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773275414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:58,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:58,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008891123] [2022-12-14 12:46:58,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:58,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:58,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:58,743 INFO L87 Difference]: Start difference. First operand 1496 states and 2131 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:46:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:58,852 INFO L93 Difference]: Finished difference Result 2650 states and 3836 transitions. [2022-12-14 12:46:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:58,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2022-12-14 12:46:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:58,859 INFO L225 Difference]: With dead ends: 2650 [2022-12-14 12:46:58,859 INFO L226 Difference]: Without dead ends: 1888 [2022-12-14 12:46:58,862 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 12:46:58,862 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:58,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 335 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:46:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-12-14 12:46:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1740. [2022-12-14 12:46:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1407 states have (on average 1.4747690120824448) internal successors, (2075), 1416 states have internal predecessors, (2075), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-12-14 12:46:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2531 transitions. [2022-12-14 12:46:58,929 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2531 transitions. Word has length 86 [2022-12-14 12:46:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:58,929 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 2531 transitions. [2022-12-14 12:46:58,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:46:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2531 transitions. [2022-12-14 12:46:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:46:58,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:58,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:58,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:46:58,933 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1305778803, now seen corresponding path program 1 times [2022-12-14 12:46:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:58,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349601083] [2022-12-14 12:46:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:58,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 12:46:58,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:58,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349601083] [2022-12-14 12:46:58,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349601083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:58,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:58,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356539865] [2022-12-14 12:46:58,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:58,992 INFO L87 Difference]: Start difference. First operand 1740 states and 2531 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:46:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:59,155 INFO L93 Difference]: Finished difference Result 5137 states and 7552 transitions. [2022-12-14 12:46:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 115 [2022-12-14 12:46:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:59,166 INFO L225 Difference]: With dead ends: 5137 [2022-12-14 12:46:59,166 INFO L226 Difference]: Without dead ends: 3402 [2022-12-14 12:46:59,170 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 12:46:59,171 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 127 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:59,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 267 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2022-12-14 12:46:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3376. [2022-12-14 12:46:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 2731 states have (on average 1.459904796777737) internal successors, (3987), 2748 states have internal predecessors, (3987), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-12-14 12:46:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 4859 transitions. [2022-12-14 12:46:59,295 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 4859 transitions. Word has length 115 [2022-12-14 12:46:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:59,295 INFO L495 AbstractCegarLoop]: Abstraction has 3376 states and 4859 transitions. [2022-12-14 12:46:59,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:46:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 4859 transitions. [2022-12-14 12:46:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:46:59,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:59,301 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:59,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:46:59,302 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:59,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1988661717, now seen corresponding path program 1 times [2022-12-14 12:46:59,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:59,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480757756] [2022-12-14 12:46:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:59,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 12:46:59,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:59,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480757756] [2022-12-14 12:46:59,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480757756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:59,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:59,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:59,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264720420] [2022-12-14 12:46:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:59,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:59,354 INFO L87 Difference]: Start difference. First operand 3376 states and 4859 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:46:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:59,619 INFO L93 Difference]: Finished difference Result 9973 states and 14496 transitions. [2022-12-14 12:46:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:59,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 115 [2022-12-14 12:46:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:59,643 INFO L225 Difference]: With dead ends: 9973 [2022-12-14 12:46:59,643 INFO L226 Difference]: Without dead ends: 6602 [2022-12-14 12:46:59,652 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 12:46:59,653 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 130 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:59,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 280 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2022-12-14 12:46:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 6552. [2022-12-14 12:46:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6552 states, 5299 states have (on average 1.4438573315719947) internal successors, (7651), 5332 states have internal predecessors, (7651), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-12-14 12:46:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6552 states to 6552 states and 9323 transitions. [2022-12-14 12:46:59,912 INFO L78 Accepts]: Start accepts. Automaton has 6552 states and 9323 transitions. Word has length 115 [2022-12-14 12:46:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:59,912 INFO L495 AbstractCegarLoop]: Abstraction has 6552 states and 9323 transitions. [2022-12-14 12:46:59,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:46:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6552 states and 9323 transitions. [2022-12-14 12:46:59,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 12:46:59,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:59,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:59,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:46:59,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2113109445, now seen corresponding path program 1 times [2022-12-14 12:46:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445729092] [2022-12-14 12:46:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:59,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 12:47:00,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445729092] [2022-12-14 12:47:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445729092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475274376] [2022-12-14 12:47:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:00,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:00,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:00,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:00,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:47:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:47:00,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:47:00,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:47:00,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475274376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:47:00,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:47:00,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:47:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065327377] [2022-12-14 12:47:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:47:00,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:47:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:47:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:47:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:00,216 INFO L87 Difference]: Start difference. First operand 6552 states and 9323 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:47:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:47:00,567 INFO L93 Difference]: Finished difference Result 12380 states and 17821 transitions. [2022-12-14 12:47:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:47:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 133 [2022-12-14 12:47:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:47:00,616 INFO L225 Difference]: With dead ends: 12380 [2022-12-14 12:47:00,616 INFO L226 Difference]: Without dead ends: 9034 [2022-12-14 12:47:00,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:47:00,631 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 96 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:47:00,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 362 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:47:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2022-12-14 12:47:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 7784. [2022-12-14 12:47:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 6435 states have (on average 1.4798756798756798) internal successors, (9523), 6468 states have internal predecessors, (9523), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-12-14 12:47:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 11291 transitions. [2022-12-14 12:47:00,989 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 11291 transitions. Word has length 133 [2022-12-14 12:47:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:47:00,989 INFO L495 AbstractCegarLoop]: Abstraction has 7784 states and 11291 transitions. [2022-12-14 12:47:00,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:47:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 11291 transitions. [2022-12-14 12:47:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 12:47:01,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:47:01,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:47:01,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:47:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:01,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:47:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:47:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1570750828, now seen corresponding path program 2 times [2022-12-14 12:47:01,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:47:01,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399267309] [2022-12-14 12:47:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:47:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:47:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:47:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 12:47:01,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:47:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399267309] [2022-12-14 12:47:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399267309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:47:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999408815] [2022-12-14 12:47:01,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:47:01,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:47:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:47:01,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:47:01,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d040455a-896c-4bd0-9beb-64a56df875e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:47:01,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:47:01,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:47:01,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:47:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:47:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:47:01,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:47:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 12:47:02,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999408815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:47:02,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236833202] [2022-12-14 12:47:02,198 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 12:47:02,198 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:47:02,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:47:02,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:47:02,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:47:14,535 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-12-14 12:47:14,566 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-12-14 12:47:18,335 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12