./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/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_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/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_dd83622b-d25b-451c-95d7-62b2c2eb1f15/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 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 --- 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 03:12:03,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:12:03,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:12:03,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:12:03,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:12:03,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:12:03,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:12:03,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:12:03,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:12:03,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:12:03,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:12:03,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:12:03,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:12:03,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:12:03,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:12:03,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:12:03,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:12:03,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:12:03,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:12:03,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:12:03,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:12:03,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:12:03,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:12:03,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:12:03,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:12:03,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:12:03,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:12:03,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:12:03,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:12:03,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:12:03,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:12:03,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:12:03,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:12:03,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:12:03,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:12:03,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:12:03,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:12:03,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:12:03,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:12:03,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:12:03,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:12:03,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:12:03,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:12:03,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:12:03,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:12:03,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:12:03,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:12:03,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:12:03,795 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:12:03,796 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:12:03,796 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:12:03,796 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:12:03,796 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:12:03,796 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:12:03,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:12:03,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:12:03,798 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:12:03,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:12:03,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:12:03,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:12:03,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:12:03,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:12:03,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:12:03,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:12:03,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:12:03,799 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_dd83622b-d25b-451c-95d7-62b2c2eb1f15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 [2022-12-14 03:12:03,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:12:04,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:12:04,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:12:04,011 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:12:04,011 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:12:04,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2022-12-14 03:12:06,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:12:06,738 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:12:06,739 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2022-12-14 03:12:06,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/data/ab0a1d963/c675d0d2bf394e839f1405b8ef08673d/FLAGfb38f13b0 [2022-12-14 03:12:06,765 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/data/ab0a1d963/c675d0d2bf394e839f1405b8ef08673d [2022-12-14 03:12:06,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:12:06,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:12:06,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:12:06,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:12:06,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:12:06,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:06" (1/1) ... [2022-12-14 03:12:06,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6722d844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:06, skipping insertion in model container [2022-12-14 03:12:06,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:06" (1/1) ... [2022-12-14 03:12:06,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:12:06,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:12:06,932 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_dd83622b-d25b-451c-95d7-62b2c2eb1f15/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c[646,659] [2022-12-14 03:12:07,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:12:07,041 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:12:07,050 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_dd83622b-d25b-451c-95d7-62b2c2eb1f15/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c[646,659] [2022-12-14 03:12:07,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:12:07,122 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:12:07,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07 WrapperNode [2022-12-14 03:12:07,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:12:07,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:12:07,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:12:07,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:12:07,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,174 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 856 [2022-12-14 03:12:07,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:12:07,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:12:07,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:12:07,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:12:07,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:12:07,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:12:07,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:12:07,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:12:07,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (1/1) ... [2022-12-14 03:12:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:12:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:07,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:12:07,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:12:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:12:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:12:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 03:12:07,270 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 03:12:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:12:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:12:07,345 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:12:07,346 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:12:07,923 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:12:08,021 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:12:08,021 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 03:12:08,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:08 BoogieIcfgContainer [2022-12-14 03:12:08,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:12:08,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:12:08,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:12:08,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:12:08,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:12:06" (1/3) ... [2022-12-14 03:12:08,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643529d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:08, skipping insertion in model container [2022-12-14 03:12:08,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:07" (2/3) ... [2022-12-14 03:12:08,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643529d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:08, skipping insertion in model container [2022-12-14 03:12:08,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:08" (3/3) ... [2022-12-14 03:12:08,030 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.3.cil.c [2022-12-14 03:12:08,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:12:08,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:12:08,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:12:08,104 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;@34c3235b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:12:08,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:12:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 221 states have (on average 1.7828054298642535) internal successors, (394), 227 states have internal predecessors, (394), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:12:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 03:12:08,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:08,117 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] [2022-12-14 03:12:08,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash -373810423, now seen corresponding path program 1 times [2022-12-14 03:12:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:08,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257860083] [2022-12-14 03:12:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:08,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:08,347 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 03:12:08,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:08,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257860083] [2022-12-14 03:12:08,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257860083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:08,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:08,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834656327] [2022-12-14 03:12:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:08,388 INFO L87 Difference]: Start difference. First operand has 229 states, 221 states have (on average 1.7828054298642535) internal successors, (394), 227 states have internal predecessors, (394), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:08,734 INFO L93 Difference]: Finished difference Result 612 states and 1070 transitions. [2022-12-14 03:12:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 03:12:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:08,744 INFO L225 Difference]: With dead ends: 612 [2022-12-14 03:12:08,744 INFO L226 Difference]: Without dead ends: 381 [2022-12-14 03:12:08,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:08,750 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 215 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 557 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:12:08,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-14 03:12:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 374. [2022-12-14 03:12:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 368 states have (on average 1.5353260869565217) internal successors, (565), 372 states have internal predecessors, (565), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 570 transitions. [2022-12-14 03:12:08,795 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 570 transitions. Word has length 24 [2022-12-14 03:12:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:08,795 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 570 transitions. [2022-12-14 03:12:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 570 transitions. [2022-12-14 03:12:08,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 03:12:08,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:08,797 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] [2022-12-14 03:12:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:12:08,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash 986459288, now seen corresponding path program 1 times [2022-12-14 03:12:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437487124] [2022-12-14 03:12:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:08,836 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 03:12:08,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437487124] [2022-12-14 03:12:08,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437487124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:08,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:08,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:08,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113517240] [2022-12-14 03:12:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:08,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:08,839 INFO L87 Difference]: Start difference. First operand 374 states and 570 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:09,005 INFO L93 Difference]: Finished difference Result 973 states and 1510 transitions. [2022-12-14 03:12:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:09,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 03:12:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:09,008 INFO L225 Difference]: With dead ends: 973 [2022-12-14 03:12:09,008 INFO L226 Difference]: Without dead ends: 609 [2022-12-14 03:12:09,010 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 03:12:09,011 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 267 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:09,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 733 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-12-14 03:12:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 602. [2022-12-14 03:12:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 596 states have (on average 1.570469798657718) internal successors, (936), 600 states have internal predecessors, (936), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 941 transitions. [2022-12-14 03:12:09,058 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 941 transitions. Word has length 35 [2022-12-14 03:12:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:09,058 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 941 transitions. [2022-12-14 03:12:09,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 941 transitions. [2022-12-14 03:12:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 03:12:09,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:09,061 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] [2022-12-14 03:12:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:12:09,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1320199867, now seen corresponding path program 1 times [2022-12-14 03:12:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:09,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668996734] [2022-12-14 03:12:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:09,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:09,123 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 03:12:09,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668996734] [2022-12-14 03:12:09,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668996734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:09,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:09,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:09,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576165804] [2022-12-14 03:12:09,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:09,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:09,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:09,126 INFO L87 Difference]: Start difference. First operand 602 states and 941 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:09,226 INFO L93 Difference]: Finished difference Result 1530 states and 2396 transitions. [2022-12-14 03:12:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 03:12:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:09,229 INFO L225 Difference]: With dead ends: 1530 [2022-12-14 03:12:09,229 INFO L226 Difference]: Without dead ends: 938 [2022-12-14 03:12:09,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:09,232 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 289 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:09,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 593 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-12-14 03:12:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 927. [2022-12-14 03:12:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 921 states have (on average 1.5656894679695983) internal successors, (1442), 925 states have internal predecessors, (1442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1447 transitions. [2022-12-14 03:12:09,266 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1447 transitions. Word has length 36 [2022-12-14 03:12:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:09,266 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1447 transitions. [2022-12-14 03:12:09,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1447 transitions. [2022-12-14 03:12:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 03:12:09,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:09,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:09,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 03:12:09,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1897876084, now seen corresponding path program 1 times [2022-12-14 03:12:09,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:09,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449529611] [2022-12-14 03:12:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:09,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:09,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449529611] [2022-12-14 03:12:09,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449529611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:09,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:09,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391388057] [2022-12-14 03:12:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:09,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:12:09,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:12:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:12:09,366 INFO L87 Difference]: Start difference. First operand 927 states and 1447 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:09,834 INFO L93 Difference]: Finished difference Result 3322 states and 5207 transitions. [2022-12-14 03:12:09,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:12:09,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 03:12:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:09,843 INFO L225 Difference]: With dead ends: 3322 [2022-12-14 03:12:09,843 INFO L226 Difference]: Without dead ends: 2405 [2022-12-14 03:12:09,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:12:09,846 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 950 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:09,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 1183 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:12:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2022-12-14 03:12:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1951. [2022-12-14 03:12:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1945 states have (on average 1.5670951156812338) internal successors, (3048), 1949 states have internal predecessors, (3048), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3053 transitions. [2022-12-14 03:12:09,923 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3053 transitions. Word has length 41 [2022-12-14 03:12:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:09,923 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 3053 transitions. [2022-12-14 03:12:09,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3053 transitions. [2022-12-14 03:12:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:12:09,924 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:09,924 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, 1, 1, 1] [2022-12-14 03:12:09,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 03:12:09,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash -374366451, now seen corresponding path program 1 times [2022-12-14 03:12:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:09,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549464654] [2022-12-14 03:12:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:09,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:09,956 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 03:12:09,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:09,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549464654] [2022-12-14 03:12:09,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549464654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:09,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:09,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:09,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581598301] [2022-12-14 03:12:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:09,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:09,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:09,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:09,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:09,957 INFO L87 Difference]: Start difference. First operand 1951 states and 3053 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:10,148 INFO L93 Difference]: Finished difference Result 5534 states and 8642 transitions. [2022-12-14 03:12:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 03:12:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:10,156 INFO L225 Difference]: With dead ends: 5534 [2022-12-14 03:12:10,156 INFO L226 Difference]: Without dead ends: 3591 [2022-12-14 03:12:10,159 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 03:12:10,159 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 311 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:10,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 607 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2022-12-14 03:12:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3524. [2022-12-14 03:12:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3518 states have (on average 1.5383740761796476) internal successors, (5412), 3522 states have internal predecessors, (5412), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 5417 transitions. [2022-12-14 03:12:10,279 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 5417 transitions. Word has length 48 [2022-12-14 03:12:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:10,279 INFO L495 AbstractCegarLoop]: Abstraction has 3524 states and 5417 transitions. [2022-12-14 03:12:10,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 5417 transitions. [2022-12-14 03:12:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:12:10,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:10,280 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, 1, 1, 1] [2022-12-14 03:12:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 03:12:10,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash -227164991, now seen corresponding path program 1 times [2022-12-14 03:12:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256567619] [2022-12-14 03:12:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:10,311 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 03:12:10,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:10,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256567619] [2022-12-14 03:12:10,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256567619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:10,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:10,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:10,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110197282] [2022-12-14 03:12:10,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:10,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:10,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:10,312 INFO L87 Difference]: Start difference. First operand 3524 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:10,581 INFO L93 Difference]: Finished difference Result 8397 states and 12878 transitions. [2022-12-14 03:12:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 03:12:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:10,624 INFO L225 Difference]: With dead ends: 8397 [2022-12-14 03:12:10,624 INFO L226 Difference]: Without dead ends: 4882 [2022-12-14 03:12:10,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:10,631 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 298 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:10,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 520 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2022-12-14 03:12:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 4620. [2022-12-14 03:12:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 4614 states have (on average 1.5240572171651496) internal successors, (7032), 4618 states have internal predecessors, (7032), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 7037 transitions. [2022-12-14 03:12:10,809 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 7037 transitions. Word has length 48 [2022-12-14 03:12:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:10,809 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 7037 transitions. [2022-12-14 03:12:10,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 7037 transitions. [2022-12-14 03:12:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 03:12:10,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:10,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:10,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 03:12:10,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1121558256, now seen corresponding path program 1 times [2022-12-14 03:12:10,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:10,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828385418] [2022-12-14 03:12:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:10,853 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 03:12:10,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828385418] [2022-12-14 03:12:10,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828385418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:10,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:10,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:10,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243960512] [2022-12-14 03:12:10,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:10,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:10,855 INFO L87 Difference]: Start difference. First operand 4620 states and 7037 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:11,322 INFO L93 Difference]: Finished difference Result 11218 states and 17099 transitions. [2022-12-14 03:12:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-14 03:12:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:11,337 INFO L225 Difference]: With dead ends: 11218 [2022-12-14 03:12:11,337 INFO L226 Difference]: Without dead ends: 6607 [2022-12-14 03:12:11,342 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 03:12:11,342 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 210 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:11,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 617 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:11,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6607 states. [2022-12-14 03:12:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6607 to 5359. [2022-12-14 03:12:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5353 states have (on average 1.470016813002055) internal successors, (7869), 5357 states have internal predecessors, (7869), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 7874 transitions. [2022-12-14 03:12:11,648 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 7874 transitions. Word has length 54 [2022-12-14 03:12:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:11,648 INFO L495 AbstractCegarLoop]: Abstraction has 5359 states and 7874 transitions. [2022-12-14 03:12:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 7874 transitions. [2022-12-14 03:12:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 03:12:11,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:11,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:11,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 03:12:11,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -512763612, now seen corresponding path program 1 times [2022-12-14 03:12:11,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:11,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573027123] [2022-12-14 03:12:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:11,708 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 03:12:11,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573027123] [2022-12-14 03:12:11,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573027123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:11,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:11,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020718411] [2022-12-14 03:12:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:11,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:11,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:11,711 INFO L87 Difference]: Start difference. First operand 5359 states and 7874 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:11,947 INFO L93 Difference]: Finished difference Result 10584 states and 15582 transitions. [2022-12-14 03:12:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 03:12:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:11,958 INFO L225 Difference]: With dead ends: 10584 [2022-12-14 03:12:11,959 INFO L226 Difference]: Without dead ends: 5234 [2022-12-14 03:12:11,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:11,964 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 283 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:11,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 330 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:12:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2022-12-14 03:12:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 5234. [2022-12-14 03:12:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5228 states have (on average 1.4655700076511093) internal successors, (7662), 5232 states have internal predecessors, (7662), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 7667 transitions. [2022-12-14 03:12:12,188 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 7667 transitions. Word has length 56 [2022-12-14 03:12:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:12,188 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 7667 transitions. [2022-12-14 03:12:12,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 7667 transitions. [2022-12-14 03:12:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 03:12:12,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:12,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:12,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 03:12:12,191 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:12,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:12,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2145383746, now seen corresponding path program 1 times [2022-12-14 03:12:12,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:12,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034608408] [2022-12-14 03:12:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:12,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:12,231 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 03:12:12,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034608408] [2022-12-14 03:12:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034608408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:12,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:12,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568657035] [2022-12-14 03:12:12,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:12,233 INFO L87 Difference]: Start difference. First operand 5234 states and 7667 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:12,629 INFO L93 Difference]: Finished difference Result 11863 states and 17632 transitions. [2022-12-14 03:12:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:12,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 03:12:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:12,644 INFO L225 Difference]: With dead ends: 11863 [2022-12-14 03:12:12,645 INFO L226 Difference]: Without dead ends: 6638 [2022-12-14 03:12:12,651 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 03:12:12,652 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 260 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:12,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 743 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2022-12-14 03:12:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 4109. [2022-12-14 03:12:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4103 states have (on average 1.491104070192542) internal successors, (6118), 4107 states have internal predecessors, (6118), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 6123 transitions. [2022-12-14 03:12:12,936 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 6123 transitions. Word has length 57 [2022-12-14 03:12:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:12,937 INFO L495 AbstractCegarLoop]: Abstraction has 4109 states and 6123 transitions. [2022-12-14 03:12:12,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 6123 transitions. [2022-12-14 03:12:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 03:12:12,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:12,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 03:12:12,938 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash -350602813, now seen corresponding path program 1 times [2022-12-14 03:12:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:12,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62458053] [2022-12-14 03:12:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:12,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:13,026 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 03:12:13,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62458053] [2022-12-14 03:12:13,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62458053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:13,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:13,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 03:12:13,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126201236] [2022-12-14 03:12:13,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:12:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:12:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:13,028 INFO L87 Difference]: Start difference. First operand 4109 states and 6123 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:14,674 INFO L93 Difference]: Finished difference Result 22357 states and 33204 transitions. [2022-12-14 03:12:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 03:12:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 03:12:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:14,702 INFO L225 Difference]: With dead ends: 22357 [2022-12-14 03:12:14,702 INFO L226 Difference]: Without dead ends: 18321 [2022-12-14 03:12:14,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-12-14 03:12:14,709 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 1743 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:14,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1743 Valid, 2901 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:12:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18321 states. [2022-12-14 03:12:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18321 to 5567. [2022-12-14 03:12:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5567 states, 5561 states have (on average 1.487502247797159) internal successors, (8272), 5565 states have internal predecessors, (8272), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5567 states to 5567 states and 8277 transitions. [2022-12-14 03:12:15,052 INFO L78 Accepts]: Start accepts. Automaton has 5567 states and 8277 transitions. Word has length 59 [2022-12-14 03:12:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:15,053 INFO L495 AbstractCegarLoop]: Abstraction has 5567 states and 8277 transitions. [2022-12-14 03:12:15,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5567 states and 8277 transitions. [2022-12-14 03:12:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 03:12:15,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:15,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:15,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 03:12:15,054 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash 657853629, now seen corresponding path program 1 times [2022-12-14 03:12:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892510729] [2022-12-14 03:12:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:15,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:15,135 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 03:12:15,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:15,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892510729] [2022-12-14 03:12:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892510729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:15,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:15,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 03:12:15,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414150684] [2022-12-14 03:12:15,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:15,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:12:15,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:12:15,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:12:15,137 INFO L87 Difference]: Start difference. First operand 5567 states and 8277 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:18,482 INFO L93 Difference]: Finished difference Result 40124 states and 59236 transitions. [2022-12-14 03:12:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 03:12:18,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-14 03:12:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:18,540 INFO L225 Difference]: With dead ends: 40124 [2022-12-14 03:12:18,540 INFO L226 Difference]: Without dead ends: 34630 [2022-12-14 03:12:18,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-12-14 03:12:18,555 INFO L413 NwaCegarLoop]: 1408 mSDtfsCounter, 3199 mSDsluCounter, 5114 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3199 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:18,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3199 Valid, 6522 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:12:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34630 states. [2022-12-14 03:12:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34630 to 5895. [2022-12-14 03:12:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5895 states, 5889 states have (on average 1.476991000169808) internal successors, (8698), 5893 states have internal predecessors, (8698), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5895 states to 5895 states and 8703 transitions. [2022-12-14 03:12:19,345 INFO L78 Accepts]: Start accepts. Automaton has 5895 states and 8703 transitions. Word has length 60 [2022-12-14 03:12:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:19,345 INFO L495 AbstractCegarLoop]: Abstraction has 5895 states and 8703 transitions. [2022-12-14 03:12:19,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5895 states and 8703 transitions. [2022-12-14 03:12:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 03:12:19,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:19,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 03:12:19,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1360465100, now seen corresponding path program 1 times [2022-12-14 03:12:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759688840] [2022-12-14 03:12:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:19,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:19,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759688840] [2022-12-14 03:12:19,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759688840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:19,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:19,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849137731] [2022-12-14 03:12:19,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:19,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:19,370 INFO L87 Difference]: Start difference. First operand 5895 states and 8703 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:20,019 INFO L93 Difference]: Finished difference Result 12511 states and 18432 transitions. [2022-12-14 03:12:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 03:12:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:20,031 INFO L225 Difference]: With dead ends: 12511 [2022-12-14 03:12:20,032 INFO L226 Difference]: Without dead ends: 6634 [2022-12-14 03:12:20,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:20,036 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 122 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:20,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 624 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6634 states. [2022-12-14 03:12:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6634 to 5946. [2022-12-14 03:12:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5946 states, 5940 states have (on average 1.474074074074074) internal successors, (8756), 5944 states have internal predecessors, (8756), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5946 states to 5946 states and 8761 transitions. [2022-12-14 03:12:20,532 INFO L78 Accepts]: Start accepts. Automaton has 5946 states and 8761 transitions. Word has length 72 [2022-12-14 03:12:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:20,533 INFO L495 AbstractCegarLoop]: Abstraction has 5946 states and 8761 transitions. [2022-12-14 03:12:20,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5946 states and 8761 transitions. [2022-12-14 03:12:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 03:12:20,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:20,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:20,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 03:12:20,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:20,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1221901208, now seen corresponding path program 1 times [2022-12-14 03:12:20,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:20,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228821325] [2022-12-14 03:12:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:20,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228821325] [2022-12-14 03:12:20,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228821325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:20,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:20,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:12:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197736302] [2022-12-14 03:12:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:20,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:12:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:12:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:12:20,586 INFO L87 Difference]: Start difference. First operand 5946 states and 8761 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:21,721 INFO L93 Difference]: Finished difference Result 13639 states and 20015 transitions. [2022-12-14 03:12:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:12:21,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-12-14 03:12:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:21,733 INFO L225 Difference]: With dead ends: 13639 [2022-12-14 03:12:21,733 INFO L226 Difference]: Without dead ends: 7703 [2022-12-14 03:12:21,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:12:21,742 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 331 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:21,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 898 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2022-12-14 03:12:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 6842. [2022-12-14 03:12:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6836 states have (on average 1.4575775307197192) internal successors, (9964), 6840 states have internal predecessors, (9964), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 9969 transitions. [2022-12-14 03:12:22,620 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 9969 transitions. Word has length 83 [2022-12-14 03:12:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:22,620 INFO L495 AbstractCegarLoop]: Abstraction has 6842 states and 9969 transitions. [2022-12-14 03:12:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 9969 transitions. [2022-12-14 03:12:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 03:12:22,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:22,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:22,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 03:12:22,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash -778913741, now seen corresponding path program 1 times [2022-12-14 03:12:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:22,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155850537] [2022-12-14 03:12:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:22,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155850537] [2022-12-14 03:12:22,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155850537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:22,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:22,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853435054] [2022-12-14 03:12:22,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:22,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:22,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:22,666 INFO L87 Difference]: Start difference. First operand 6842 states and 9969 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:23,165 INFO L93 Difference]: Finished difference Result 9960 states and 14596 transitions. [2022-12-14 03:12:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-14 03:12:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:23,169 INFO L225 Difference]: With dead ends: 9960 [2022-12-14 03:12:23,169 INFO L226 Difference]: Without dead ends: 3157 [2022-12-14 03:12:23,174 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 03:12:23,174 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 304 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:23,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 444 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-12-14 03:12:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3127. [2022-12-14 03:12:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3121 states have (on average 1.400192246074976) internal successors, (4370), 3125 states have internal predecessors, (4370), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 4375 transitions. [2022-12-14 03:12:23,421 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 4375 transitions. Word has length 89 [2022-12-14 03:12:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:23,421 INFO L495 AbstractCegarLoop]: Abstraction has 3127 states and 4375 transitions. [2022-12-14 03:12:23,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 4375 transitions. [2022-12-14 03:12:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 03:12:23,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:23,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 03:12:23,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1383562442, now seen corresponding path program 1 times [2022-12-14 03:12:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:23,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205070704] [2022-12-14 03:12:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:23,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205070704] [2022-12-14 03:12:23,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205070704] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:23,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:23,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:12:23,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266382462] [2022-12-14 03:12:23,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:23,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:12:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:12:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:12:23,467 INFO L87 Difference]: Start difference. First operand 3127 states and 4375 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:24,904 INFO L93 Difference]: Finished difference Result 13310 states and 18683 transitions. [2022-12-14 03:12:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:12:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-12-14 03:12:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:24,912 INFO L225 Difference]: With dead ends: 13310 [2022-12-14 03:12:24,913 INFO L226 Difference]: Without dead ends: 10321 [2022-12-14 03:12:24,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 03:12:24,916 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 1402 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:24,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 2648 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2022-12-14 03:12:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 3129. [2022-12-14 03:12:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 3123 states have (on average 1.3960934998398975) internal successors, (4360), 3127 states have internal predecessors, (4360), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4365 transitions. [2022-12-14 03:12:25,238 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4365 transitions. Word has length 93 [2022-12-14 03:12:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:25,238 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 4365 transitions. [2022-12-14 03:12:25,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4365 transitions. [2022-12-14 03:12:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 03:12:25,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:25,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 03:12:25,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1134926843, now seen corresponding path program 1 times [2022-12-14 03:12:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:25,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964905990] [2022-12-14 03:12:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:25,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:25,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964905990] [2022-12-14 03:12:25,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964905990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:25,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336339131] [2022-12-14 03:12:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:25,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:25,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:25,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:12:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:25,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:25,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336339131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:25,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:25,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 03:12:25,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234491986] [2022-12-14 03:12:25,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:25,472 INFO L87 Difference]: Start difference. First operand 3129 states and 4365 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:25,988 INFO L93 Difference]: Finished difference Result 3953 states and 5506 transitions. [2022-12-14 03:12:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:25,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-12-14 03:12:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:25,992 INFO L225 Difference]: With dead ends: 3953 [2022-12-14 03:12:25,992 INFO L226 Difference]: Without dead ends: 3949 [2022-12-14 03:12:25,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:25,993 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 205 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:25,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 624 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2022-12-14 03:12:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3860. [2022-12-14 03:12:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 3854 states have (on average 1.4003632589517385) internal successors, (5397), 3858 states have internal predecessors, (5397), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 5402 transitions. [2022-12-14 03:12:26,364 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 5402 transitions. Word has length 95 [2022-12-14 03:12:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:26,365 INFO L495 AbstractCegarLoop]: Abstraction has 3860 states and 5402 transitions. [2022-12-14 03:12:26,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 5402 transitions. [2022-12-14 03:12:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 03:12:26,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:26,366 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:26,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:12:26,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:26,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -651976157, now seen corresponding path program 1 times [2022-12-14 03:12:26,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:26,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646710877] [2022-12-14 03:12:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:26,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646710877] [2022-12-14 03:12:26,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646710877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545143312] [2022-12-14 03:12:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:26,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:26,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:12:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:26,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:26,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545143312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:26,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:26,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 03:12:26,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875604231] [2022-12-14 03:12:26,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:26,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:26,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:26,844 INFO L87 Difference]: Start difference. First operand 3860 states and 5402 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:27,290 INFO L93 Difference]: Finished difference Result 7560 states and 10626 transitions. [2022-12-14 03:12:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-12-14 03:12:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:27,295 INFO L225 Difference]: With dead ends: 7560 [2022-12-14 03:12:27,295 INFO L226 Difference]: Without dead ends: 3860 [2022-12-14 03:12:27,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 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 03:12:27,299 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 234 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:27,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 337 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2022-12-14 03:12:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3860. [2022-12-14 03:12:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3860 states, 3854 states have (on average 1.3692267773741567) internal successors, (5277), 3858 states have internal predecessors, (5277), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3860 states to 3860 states and 5282 transitions. [2022-12-14 03:12:27,750 INFO L78 Accepts]: Start accepts. Automaton has 3860 states and 5282 transitions. Word has length 147 [2022-12-14 03:12:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:27,750 INFO L495 AbstractCegarLoop]: Abstraction has 3860 states and 5282 transitions. [2022-12-14 03:12:27,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3860 states and 5282 transitions. [2022-12-14 03:12:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 03:12:27,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:27,752 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:12:27,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:12:27,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 03:12:27,953 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash -474008596, now seen corresponding path program 1 times [2022-12-14 03:12:27,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029610400] [2022-12-14 03:12:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:28,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029610400] [2022-12-14 03:12:28,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029610400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980720067] [2022-12-14 03:12:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:28,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:28,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:28,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:28,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:12:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:28,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:28,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:12:28,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:28,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980720067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:28,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:28,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:12:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923598336] [2022-12-14 03:12:28,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:28,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:28,214 INFO L87 Difference]: Start difference. First operand 3860 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:28,824 INFO L93 Difference]: Finished difference Result 7544 states and 10370 transitions. [2022-12-14 03:12:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 03:12:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:28,828 INFO L225 Difference]: With dead ends: 7544 [2022-12-14 03:12:28,828 INFO L226 Difference]: Without dead ends: 3844 [2022-12-14 03:12:28,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:28,831 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 244 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:28,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 309 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-12-14 03:12:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3844. [2022-12-14 03:12:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3838 states have (on average 1.339499739447629) internal successors, (5141), 3842 states have internal predecessors, (5141), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5146 transitions. [2022-12-14 03:12:29,227 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5146 transitions. Word has length 150 [2022-12-14 03:12:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:29,227 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 5146 transitions. [2022-12-14 03:12:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5146 transitions. [2022-12-14 03:12:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 03:12:29,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:29,229 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:12:29,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:12:29,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 03:12:29,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:29,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash -731142929, now seen corresponding path program 1 times [2022-12-14 03:12:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:29,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921684895] [2022-12-14 03:12:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:29,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:29,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921684895] [2022-12-14 03:12:29,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921684895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:29,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113978582] [2022-12-14 03:12:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:29,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:29,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:29,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:29,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:12:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:12:29,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:29,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113978582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:29,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:29,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:12:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982645214] [2022-12-14 03:12:29,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:29,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:29,636 INFO L87 Difference]: Start difference. First operand 3844 states and 5146 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:30,355 INFO L93 Difference]: Finished difference Result 8581 states and 11653 transitions. [2022-12-14 03:12:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 03:12:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:30,360 INFO L225 Difference]: With dead ends: 8581 [2022-12-14 03:12:30,360 INFO L226 Difference]: Without dead ends: 4897 [2022-12-14 03:12:30,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:30,364 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 177 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:30,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 541 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4897 states. [2022-12-14 03:12:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4897 to 4632. [2022-12-14 03:12:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4626 states have (on average 1.313013402507566) internal successors, (6074), 4630 states have internal predecessors, (6074), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 6079 transitions. [2022-12-14 03:12:30,848 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 6079 transitions. Word has length 151 [2022-12-14 03:12:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:30,848 INFO L495 AbstractCegarLoop]: Abstraction has 4632 states and 6079 transitions. [2022-12-14 03:12:30,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:12:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 6079 transitions. [2022-12-14 03:12:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 03:12:30,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:30,849 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:12:30,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 03:12:31,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:31,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash 325114710, now seen corresponding path program 1 times [2022-12-14 03:12:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:31,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469771034] [2022-12-14 03:12:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:31,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:31,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469771034] [2022-12-14 03:12:31,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469771034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894362606] [2022-12-14 03:12:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:31,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:31,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:31,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:12:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:31,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:12:31,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:31,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:12:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 03:12:31,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894362606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:12:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659727113] [2022-12-14 03:12:31,719 INFO L159 IcfgInterpreter]: Started Sifa with 106 locations of interest [2022-12-14 03:12:31,719 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:12:31,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:12:31,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:12:31,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:18,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:51,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1659727113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:51,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [9, 9, 9] total 56 [2022-12-14 03:15:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948688051] [2022-12-14 03:15:51,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 03:15:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 03:15:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2856, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 03:15:51,849 INFO L87 Difference]: Start difference. First operand 4632 states and 6079 transitions. Second operand has 49 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 48 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:16,028 INFO L93 Difference]: Finished difference Result 9405 states and 12316 transitions. [2022-12-14 03:16:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 03:16:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 48 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-12-14 03:16:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:16,033 INFO L225 Difference]: With dead ends: 9405 [2022-12-14 03:16:16,034 INFO L226 Difference]: Without dead ends: 4758 [2022-12-14 03:16:16,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 382 SyntacticMatches, 31 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=372, Invalid=4740, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 03:16:16,039 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 135 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 9015 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 9064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 9015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:16,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1336 Invalid, 9064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 9015 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-12-14 03:16:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2022-12-14 03:16:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 4748. [2022-12-14 03:16:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4742 states have (on average 1.3055672711935893) internal successors, (6191), 4746 states have internal predecessors, (6191), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 6196 transitions. [2022-12-14 03:16:16,604 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 6196 transitions. Word has length 153 [2022-12-14 03:16:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:16,604 INFO L495 AbstractCegarLoop]: Abstraction has 4748 states and 6196 transitions. [2022-12-14 03:16:16,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 48 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 6196 transitions. [2022-12-14 03:16:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 03:16:16,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:16,606 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:16,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 03:16:16,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:16,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 116264085, now seen corresponding path program 1 times [2022-12-14 03:16:16,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:16,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916475764] [2022-12-14 03:16:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 03:16:16,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916475764] [2022-12-14 03:16:16,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916475764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:16,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:16:16,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:16:16,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474570899] [2022-12-14 03:16:16,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:16,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:16:16,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:16,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:16:16,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:16:16,928 INFO L87 Difference]: Start difference. First operand 4748 states and 6196 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:18,271 INFO L93 Difference]: Finished difference Result 10197 states and 13308 transitions. [2022-12-14 03:16:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:16:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-12-14 03:16:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:18,276 INFO L225 Difference]: With dead ends: 10197 [2022-12-14 03:16:18,276 INFO L226 Difference]: Without dead ends: 5470 [2022-12-14 03:16:18,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:16:18,280 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 582 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:18,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1006 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:16:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2022-12-14 03:16:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 4959. [2022-12-14 03:16:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4953 states have (on average 1.2842721582879064) internal successors, (6361), 4957 states have internal predecessors, (6361), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 6366 transitions. [2022-12-14 03:16:18,901 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 6366 transitions. Word has length 173 [2022-12-14 03:16:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:18,901 INFO L495 AbstractCegarLoop]: Abstraction has 4959 states and 6366 transitions. [2022-12-14 03:16:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 6366 transitions. [2022-12-14 03:16:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:16:18,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:18,902 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:18,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 03:16:18,902 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1815055462, now seen corresponding path program 1 times [2022-12-14 03:16:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:18,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507293874] [2022-12-14 03:16:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 03:16:18,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:18,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507293874] [2022-12-14 03:16:18,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507293874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:18,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:16:18,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:16:18,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094213480] [2022-12-14 03:16:18,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:18,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:16:18,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:16:18,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:16:18,988 INFO L87 Difference]: Start difference. First operand 4959 states and 6366 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:19,753 INFO L93 Difference]: Finished difference Result 10151 states and 13080 transitions. [2022-12-14 03:16:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:16:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-14 03:16:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:19,759 INFO L225 Difference]: With dead ends: 10151 [2022-12-14 03:16:19,759 INFO L226 Difference]: Without dead ends: 5340 [2022-12-14 03:16:19,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:16:19,763 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 292 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:19,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1032 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:16:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2022-12-14 03:16:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 4909. [2022-12-14 03:16:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4903 states have (on average 1.2863552926779522) internal successors, (6307), 4907 states have internal predecessors, (6307), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 6312 transitions. [2022-12-14 03:16:20,332 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 6312 transitions. Word has length 174 [2022-12-14 03:16:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:20,332 INFO L495 AbstractCegarLoop]: Abstraction has 4909 states and 6312 transitions. [2022-12-14 03:16:20,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 6312 transitions. [2022-12-14 03:16:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-14 03:16:20,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:20,333 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:20,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 03:16:20,333 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 552249236, now seen corresponding path program 1 times [2022-12-14 03:16:20,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:20,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280556234] [2022-12-14 03:16:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:16:20,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:20,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280556234] [2022-12-14 03:16:20,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280556234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:20,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:16:20,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:16:20,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438466460] [2022-12-14 03:16:20,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:16:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:20,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:16:20,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:16:20,377 INFO L87 Difference]: Start difference. First operand 4909 states and 6312 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:21,382 INFO L93 Difference]: Finished difference Result 11319 states and 14639 transitions. [2022-12-14 03:16:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:16:21,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-12-14 03:16:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:21,390 INFO L225 Difference]: With dead ends: 11319 [2022-12-14 03:16:21,390 INFO L226 Difference]: Without dead ends: 6572 [2022-12-14 03:16:21,395 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 03:16:21,395 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 205 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:21,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 660 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:16:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2022-12-14 03:16:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 6566. [2022-12-14 03:16:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6566 states, 6560 states have (on average 1.2762195121951219) internal successors, (8372), 6564 states have internal predecessors, (8372), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6566 states to 6566 states and 8377 transitions. [2022-12-14 03:16:22,165 INFO L78 Accepts]: Start accepts. Automaton has 6566 states and 8377 transitions. Word has length 175 [2022-12-14 03:16:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:22,166 INFO L495 AbstractCegarLoop]: Abstraction has 6566 states and 8377 transitions. [2022-12-14 03:16:22,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6566 states and 8377 transitions. [2022-12-14 03:16:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-14 03:16:22,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:22,167 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-12-14 03:16:22,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 03:16:22,167 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1975312659, now seen corresponding path program 1 times [2022-12-14 03:16:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:22,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855529299] [2022-12-14 03:16:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:22,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 185 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:16:22,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:22,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855529299] [2022-12-14 03:16:22,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855529299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:22,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473951115] [2022-12-14 03:16:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:22,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:22,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:22,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:22,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd83622b-d25b-451c-95d7-62b2c2eb1f15/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:16:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 03:16:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:16:22,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:16:22,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473951115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:22,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392952571] [2022-12-14 03:16:22,909 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-12-14 03:16:22,909 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:22,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:22,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:22,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs