./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/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 0b8de634f132d76c1b6698e4c3a5f12df478fc7c8b9ceb30d48afc80707f7564 --- 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 10:41:43,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:41:43,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:41:43,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:41:43,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:41:43,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:41:43,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:41:43,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:41:43,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:41:43,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:41:43,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:41:43,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:41:43,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:41:43,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:41:43,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:41:43,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:41:43,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:41:43,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:41:43,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:41:43,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:41:43,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:41:43,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:41:43,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:41:43,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:41:43,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:41:43,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:41:43,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:41:43,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:41:43,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:41:43,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:41:43,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:41:43,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:41:43,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:41:43,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:41:43,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:41:43,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:41:43,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:41:43,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:41:43,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:41:43,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:41:43,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:41:43,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:41:43,962 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:41:43,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:41:43,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:41:43,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:41:43,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:41:43,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:41:43,964 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:41:43,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:41:43,965 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:41:43,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:41:43,971 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:41:43,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:41:43,971 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:41:43,971 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:41:43,971 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:41:43,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:41:43,972 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:41:43,972 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:41:43,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:41:43,973 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:41:43,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:41:43,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:41:43,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:41:43,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:41:43,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:41:43,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:41:43,974 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:41:43,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:41:43,974 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:41:43,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:41:43,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:41:43,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:41:43,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:41:43,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:41:43,976 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:41:43,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:41:43,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:41:43,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:41:43,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:41:43,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:41:43,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:41:43,977 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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b8de634f132d76c1b6698e4c3a5f12df478fc7c8b9ceb30d48afc80707f7564 [2022-12-14 10:41:44,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:41:44,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:41:44,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:41:44,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:41:44,188 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:41:44,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c [2022-12-14 10:41:46,843 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:41:46,994 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:41:46,994 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c [2022-12-14 10:41:47,003 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/data/57a62c82e/ea343ca1d82d4a0986abcdf22924697e/FLAGe0861543b [2022-12-14 10:41:47,014 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/data/57a62c82e/ea343ca1d82d4a0986abcdf22924697e [2022-12-14 10:41:47,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:41:47,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:41:47,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:41:47,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:41:47,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:41:47,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4304c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47, skipping insertion in model container [2022-12-14 10:41:47,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:41:47,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:41:47,167 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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[911,924] [2022-12-14 10:41:47,212 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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[8416,8429] [2022-12-14 10:41:47,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:41:47,287 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:41:47,296 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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[911,924] [2022-12-14 10:41:47,309 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_8842eb32-8919-4b6d-98ce-60c4f5b7253f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-1.c[8416,8429] [2022-12-14 10:41:47,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:41:47,355 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:41:47,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47 WrapperNode [2022-12-14 10:41:47,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:41:47,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:41:47,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:41:47,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:41:47,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,407 INFO L138 Inliner]: procedures = 77, calls = 95, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1025 [2022-12-14 10:41:47,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:41:47,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:41:47,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:41:47,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:41:47,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:41:47,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:41:47,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:41:47,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:41:47,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (1/1) ... [2022-12-14 10:41:47,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:41:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:47,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:41:47,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:41:47,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:41:47,505 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 10:41:47,505 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 10:41:47,505 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 10:41:47,505 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 10:41:47,505 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 10:41:47,505 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 10:41:47,505 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 10:41:47,505 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 10:41:47,505 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 10:41:47,505 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 10:41:47,505 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 10:41:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 10:41:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 10:41:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 10:41:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 10:41:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 10:41:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 10:41:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 10:41:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 10:41:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 10:41:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 10:41:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 10:41:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:41:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 10:41:47,507 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 10:41:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 10:41:47,507 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 10:41:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:41:47,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:41:47,508 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 10:41:47,508 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 10:41:47,508 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 10:41:47,508 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 10:41:47,634 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:41:47,637 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:41:48,205 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 10:41:48,205 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-12-14 10:41:48,256 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:41:48,548 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:41:48,548 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-12-14 10:41:48,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:48 BoogieIcfgContainer [2022-12-14 10:41:48,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:41:48,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:41:48,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:41:48,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:41:48,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:41:47" (1/3) ... [2022-12-14 10:41:48,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76146e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:48, skipping insertion in model container [2022-12-14 10:41:48,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:47" (2/3) ... [2022-12-14 10:41:48,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76146e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:48, skipping insertion in model container [2022-12-14 10:41:48,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:48" (3/3) ... [2022-12-14 10:41:48,556 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.11.cil-1.c [2022-12-14 10:41:48,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:41:48,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 10:41:48,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:41:48,614 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;@5cec0a99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:41:48,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 10:41:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 201 states have (on average 1.5472636815920398) internal successors, (311), 209 states have internal predecessors, (311), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-12-14 10:41:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:41:48,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:48,627 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] [2022-12-14 10:41:48,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -562481562, now seen corresponding path program 1 times [2022-12-14 10:41:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:48,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040063656] [2022-12-14 10:41:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:48,870 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 10:41:48,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040063656] [2022-12-14 10:41:48,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040063656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:48,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:48,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:41:48,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799094152] [2022-12-14 10:41:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:48,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:41:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:41:48,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:41:48,900 INFO L87 Difference]: Start difference. First operand has 262 states, 201 states have (on average 1.5472636815920398) internal successors, (311), 209 states have internal predecessors, (311), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 10:41:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:49,254 INFO L93 Difference]: Finished difference Result 646 states and 972 transitions. [2022-12-14 10:41:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:41:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-14 10:41:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:49,264 INFO L225 Difference]: With dead ends: 646 [2022-12-14 10:41:49,264 INFO L226 Difference]: Without dead ends: 385 [2022-12-14 10:41:49,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:41:49,270 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 447 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:49,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 690 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:41:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-12-14 10:41:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 374. [2022-12-14 10:41:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 282 states have (on average 1.4574468085106382) internal successors, (411), 287 states have internal predecessors, (411), 63 states have call successors, (63), 29 states have call predecessors, (63), 27 states have return successors, (62), 59 states have call predecessors, (62), 59 states have call successors, (62) [2022-12-14 10:41:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 536 transitions. [2022-12-14 10:41:49,321 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 536 transitions. Word has length 44 [2022-12-14 10:41:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:49,322 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 536 transitions. [2022-12-14 10:41:49,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 10:41:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 536 transitions. [2022-12-14 10:41:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:41:49,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:49,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:49,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:41:49,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -622927099, now seen corresponding path program 1 times [2022-12-14 10:41:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311535463] [2022-12-14 10:41:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:49,409 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 10:41:49,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311535463] [2022-12-14 10:41:49,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311535463] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:49,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:49,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:41:49,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299927293] [2022-12-14 10:41:49,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:49,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:41:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:41:49,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:49,412 INFO L87 Difference]: Start difference. First operand 374 states and 536 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 10:41:50,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:50,116 INFO L93 Difference]: Finished difference Result 911 states and 1259 transitions. [2022-12-14 10:41:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:41:50,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 10:41:50,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:50,119 INFO L225 Difference]: With dead ends: 911 [2022-12-14 10:41:50,119 INFO L226 Difference]: Without dead ends: 445 [2022-12-14 10:41:50,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:41:50,122 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 954 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:50,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 1181 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:41:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-12-14 10:41:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 360. [2022-12-14 10:41:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 268 states have (on average 1.4104477611940298) internal successors, (378), 273 states have internal predecessors, (378), 63 states have call successors, (63), 29 states have call predecessors, (63), 27 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-12-14 10:41:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 500 transitions. [2022-12-14 10:41:50,154 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 500 transitions. Word has length 45 [2022-12-14 10:41:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:50,155 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 500 transitions. [2022-12-14 10:41:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 10:41:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 500 transitions. [2022-12-14 10:41:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 10:41:50,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:50,156 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] [2022-12-14 10:41:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:41:50,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -524221664, now seen corresponding path program 1 times [2022-12-14 10:41:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:50,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214517153] [2022-12-14 10:41:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:50,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:50,316 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 10:41:50,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:50,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214517153] [2022-12-14 10:41:50,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214517153] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:50,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:50,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:41:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400748917] [2022-12-14 10:41:50,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:50,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:41:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:41:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:41:50,318 INFO L87 Difference]: Start difference. First operand 360 states and 500 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 10:41:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:51,043 INFO L93 Difference]: Finished difference Result 662 states and 868 transitions. [2022-12-14 10:41:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:41:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 10:41:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:51,047 INFO L225 Difference]: With dead ends: 662 [2022-12-14 10:41:51,047 INFO L226 Difference]: Without dead ends: 488 [2022-12-14 10:41:51,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:41:51,048 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 538 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:51,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1096 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:41:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-12-14 10:41:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 462. [2022-12-14 10:41:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 336 states have (on average 1.369047619047619) internal successors, (460), 341 states have internal predecessors, (460), 83 states have call successors, (83), 43 states have call predecessors, (83), 41 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 10:41:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 622 transitions. [2022-12-14 10:41:51,081 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 622 transitions. Word has length 46 [2022-12-14 10:41:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:51,081 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 622 transitions. [2022-12-14 10:41:51,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 10:41:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 622 transitions. [2022-12-14 10:41:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 10:41:51,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:51,082 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] [2022-12-14 10:41:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:41:51,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1547089108, now seen corresponding path program 1 times [2022-12-14 10:41:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:51,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221112589] [2022-12-14 10:41:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:51,121 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 10:41:51,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:51,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221112589] [2022-12-14 10:41:51,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221112589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:51,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:51,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:41:51,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785081667] [2022-12-14 10:41:51,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:51,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:41:51,124 INFO L87 Difference]: Start difference. First operand 462 states and 622 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:51,218 INFO L93 Difference]: Finished difference Result 727 states and 958 transitions. [2022-12-14 10:41:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-12-14 10:41:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:51,221 INFO L225 Difference]: With dead ends: 727 [2022-12-14 10:41:51,221 INFO L226 Difference]: Without dead ends: 181 [2022-12-14 10:41:51,222 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 10:41:51,224 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 347 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:51,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 300 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-14 10:41:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-12-14 10:41:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 147 states have (on average 1.530612244897959) internal successors, (225), 149 states have internal predecessors, (225), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 10:41:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 277 transitions. [2022-12-14 10:41:51,233 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 277 transitions. Word has length 47 [2022-12-14 10:41:51,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:51,233 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 277 transitions. [2022-12-14 10:41:51,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 277 transitions. [2022-12-14 10:41:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 10:41:51,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:51,234 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, 1, 1, 1, 1, 1] [2022-12-14 10:41:51,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:41:51,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 800355329, now seen corresponding path program 1 times [2022-12-14 10:41:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197448655] [2022-12-14 10:41:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:51,392 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 10:41:51,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197448655] [2022-12-14 10:41:51,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197448655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:51,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:51,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:41:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401925300] [2022-12-14 10:41:51,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:51,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:41:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:51,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:41:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:51,395 INFO L87 Difference]: Start difference. First operand 181 states and 277 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:41:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:52,025 INFO L93 Difference]: Finished difference Result 1014 states and 1655 transitions. [2022-12-14 10:41:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:41:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-12-14 10:41:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:52,030 INFO L225 Difference]: With dead ends: 1014 [2022-12-14 10:41:52,030 INFO L226 Difference]: Without dead ends: 839 [2022-12-14 10:41:52,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:41:52,032 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 1243 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:52,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1276 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:41:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-12-14 10:41:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 826. [2022-12-14 10:41:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 687 states have (on average 1.526928675400291) internal successors, (1049), 692 states have internal predecessors, (1049), 108 states have call successors, (108), 31 states have call predecessors, (108), 30 states have return successors, (164), 103 states have call predecessors, (164), 106 states have call successors, (164) [2022-12-14 10:41:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1321 transitions. [2022-12-14 10:41:52,075 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1321 transitions. Word has length 65 [2022-12-14 10:41:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:52,075 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1321 transitions. [2022-12-14 10:41:52,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 10:41:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1321 transitions. [2022-12-14 10:41:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:41:52,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:52,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:41:52,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:41:52,079 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -39677747, now seen corresponding path program 1 times [2022-12-14 10:41:52,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:52,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463572650] [2022-12-14 10:41:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:52,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:41:52,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:52,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463572650] [2022-12-14 10:41:52,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463572650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:52,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813512527] [2022-12-14 10:41:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:52,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:52,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:52,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:41:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:52,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:41:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:41:52,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:52,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813512527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:52,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:52,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:41:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562302354] [2022-12-14 10:41:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:52,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:52,455 INFO L87 Difference]: Start difference. First operand 826 states and 1321 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:52,647 INFO L93 Difference]: Finished difference Result 2450 states and 4036 transitions. [2022-12-14 10:41:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 10:41:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:52,657 INFO L225 Difference]: With dead ends: 2450 [2022-12-14 10:41:52,657 INFO L226 Difference]: Without dead ends: 1630 [2022-12-14 10:41:52,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 10:41:52,660 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 225 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:52,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-12-14 10:41:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1621. [2022-12-14 10:41:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1355 states have (on average 1.5232472324723247) internal successors, (2064), 1363 states have internal predecessors, (2064), 205 states have call successors, (205), 61 states have call predecessors, (205), 60 states have return successors, (315), 197 states have call predecessors, (315), 203 states have call successors, (315) [2022-12-14 10:41:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2584 transitions. [2022-12-14 10:41:52,739 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2584 transitions. Word has length 130 [2022-12-14 10:41:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:52,740 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2584 transitions. [2022-12-14 10:41:52,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2584 transitions. [2022-12-14 10:41:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:41:52,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:52,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:41:52,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:41:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:41:52,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1801217227, now seen corresponding path program 1 times [2022-12-14 10:41:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:52,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993696969] [2022-12-14 10:41:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:41:53,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993696969] [2022-12-14 10:41:53,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993696969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776707822] [2022-12-14 10:41:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:53,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:53,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:53,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:41:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:41:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:41:53,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:53,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776707822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:53,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:53,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:41:53,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476851569] [2022-12-14 10:41:53,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:53,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:53,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:53,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:53,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:53,294 INFO L87 Difference]: Start difference. First operand 1621 states and 2584 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:53,569 INFO L93 Difference]: Finished difference Result 4820 states and 7908 transitions. [2022-12-14 10:41:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 10:41:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:53,590 INFO L225 Difference]: With dead ends: 4820 [2022-12-14 10:41:53,590 INFO L226 Difference]: Without dead ends: 3205 [2022-12-14 10:41:53,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 10:41:53,595 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 228 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:53,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-12-14 10:41:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 3191. [2022-12-14 10:41:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2676 states have (on average 1.5186846038863977) internal successors, (4064), 2690 states have internal predecessors, (4064), 394 states have call successors, (394), 121 states have call predecessors, (394), 120 states have return successors, (608), 380 states have call predecessors, (608), 392 states have call successors, (608) [2022-12-14 10:41:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5066 transitions. [2022-12-14 10:41:53,746 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5066 transitions. Word has length 130 [2022-12-14 10:41:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:53,746 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 5066 transitions. [2022-12-14 10:41:53,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5066 transitions. [2022-12-14 10:41:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:41:53,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:53,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:41:53,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:41:53,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:41:53,950 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1465985037, now seen corresponding path program 1 times [2022-12-14 10:41:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:53,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309429866] [2022-12-14 10:41:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:41:54,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:54,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309429866] [2022-12-14 10:41:54,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309429866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:54,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006085829] [2022-12-14 10:41:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:54,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:54,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:54,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:41:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:41:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 10:41:54,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:54,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006085829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:54,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:54,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:41:54,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794505726] [2022-12-14 10:41:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:54,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:54,259 INFO L87 Difference]: Start difference. First operand 3191 states and 5066 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:54,669 INFO L93 Difference]: Finished difference Result 9500 states and 15511 transitions. [2022-12-14 10:41:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 10:41:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:54,694 INFO L225 Difference]: With dead ends: 9500 [2022-12-14 10:41:54,694 INFO L226 Difference]: Without dead ends: 6315 [2022-12-14 10:41:54,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 10:41:54,716 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 246 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:54,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2022-12-14 10:41:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6291. [2022-12-14 10:41:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 5288 states have (on average 1.5136157337367624) internal successors, (8004), 5314 states have internal predecessors, (8004), 762 states have call successors, (762), 241 states have call predecessors, (762), 240 states have return successors, (1176), 736 states have call predecessors, (1176), 760 states have call successors, (1176) [2022-12-14 10:41:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 9942 transitions. [2022-12-14 10:41:55,022 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 9942 transitions. Word has length 130 [2022-12-14 10:41:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:55,022 INFO L495 AbstractCegarLoop]: Abstraction has 6291 states and 9942 transitions. [2022-12-14 10:41:55,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 9942 transitions. [2022-12-14 10:41:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:41:55,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:55,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:41:55,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:41:55,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:55,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1731698993, now seen corresponding path program 1 times [2022-12-14 10:41:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:55,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008317912] [2022-12-14 10:41:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:55,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:41:55,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:55,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008317912] [2022-12-14 10:41:55,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008317912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:55,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788863818] [2022-12-14 10:41:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:55,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:55,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:41:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:41:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 10:41:55,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:55,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788863818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:55,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:55,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:41:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814650008] [2022-12-14 10:41:55,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:55,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:55,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:55,549 INFO L87 Difference]: Start difference. First operand 6291 states and 9942 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:56,148 INFO L93 Difference]: Finished difference Result 18740 states and 30435 transitions. [2022-12-14 10:41:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 10:41:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:56,203 INFO L225 Difference]: With dead ends: 18740 [2022-12-14 10:41:56,203 INFO L226 Difference]: Without dead ends: 12455 [2022-12-14 10:41:56,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 10:41:56,226 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 249 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:56,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2022-12-14 10:41:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 12411. [2022-12-14 10:41:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12411 states, 10452 states have (on average 1.5082280903176426) internal successors, (15764), 10502 states have internal predecessors, (15764), 1478 states have call successors, (1478), 481 states have call predecessors, (1478), 480 states have return successors, (2276), 1428 states have call predecessors, (2276), 1476 states have call successors, (2276) [2022-12-14 10:41:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 19518 transitions. [2022-12-14 10:41:56,895 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 19518 transitions. Word has length 130 [2022-12-14 10:41:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:56,896 INFO L495 AbstractCegarLoop]: Abstraction has 12411 states and 19518 transitions. [2022-12-14 10:41:56,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 19518 transitions. [2022-12-14 10:41:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:41:56,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:56,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:41:56,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:41:57,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:57,106 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1562011443, now seen corresponding path program 1 times [2022-12-14 10:41:57,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:57,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136044171] [2022-12-14 10:41:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:41:57,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136044171] [2022-12-14 10:41:57,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136044171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:41:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825464981] [2022-12-14 10:41:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:57,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:41:57,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:57,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:41:57,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:41:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:57,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:41:57,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:41:57,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:57,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825464981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:57,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:41:57,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:41:57,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336561161] [2022-12-14 10:41:57,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:41:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:41:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:57,439 INFO L87 Difference]: Start difference. First operand 12411 states and 19518 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:58,646 INFO L93 Difference]: Finished difference Result 36980 states and 59719 transitions. [2022-12-14 10:41:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:41:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 10:41:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:58,742 INFO L225 Difference]: With dead ends: 36980 [2022-12-14 10:41:58,742 INFO L226 Difference]: Without dead ends: 24575 [2022-12-14 10:41:58,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 10:41:58,786 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 234 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:58,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24575 states. [2022-12-14 10:41:59,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24575 to 24491. [2022-12-14 10:41:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24491 states, 20660 states have (on average 1.5026137463697966) internal successors, (31044), 20758 states have internal predecessors, (31044), 2870 states have call successors, (2870), 961 states have call predecessors, (2870), 960 states have return successors, (4404), 2772 states have call predecessors, (4404), 2868 states have call successors, (4404) [2022-12-14 10:41:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24491 states to 24491 states and 38318 transitions. [2022-12-14 10:41:59,976 INFO L78 Accepts]: Start accepts. Automaton has 24491 states and 38318 transitions. Word has length 130 [2022-12-14 10:41:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:59,976 INFO L495 AbstractCegarLoop]: Abstraction has 24491 states and 38318 transitions. [2022-12-14 10:41:59,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:41:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 24491 states and 38318 transitions. [2022-12-14 10:41:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:41:59,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:59,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:41:59,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 10:42:00,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 10:42:00,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2120704655, now seen corresponding path program 1 times [2022-12-14 10:42:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171563540] [2022-12-14 10:42:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:42:00,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:00,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171563540] [2022-12-14 10:42:00,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171563540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:42:00,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340809676] [2022-12-14 10:42:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:00,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:42:00,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:42:00,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:42:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:42:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:42:00,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:42:00,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340809676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:00,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:42:00,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 10:42:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278085683] [2022-12-14 10:42:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:00,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:42:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:42:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:00,501 INFO L87 Difference]: Start difference. First operand 24491 states and 38318 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:42:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:02,482 INFO L93 Difference]: Finished difference Result 72980 states and 117159 transitions. [2022-12-14 10:42:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:42:02,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 10:42:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:02,640 INFO L225 Difference]: With dead ends: 72980 [2022-12-14 10:42:02,640 INFO L226 Difference]: Without dead ends: 48495 [2022-12-14 10:42:02,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 10:42:02,700 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 240 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:02,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 465 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:42:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48495 states. [2022-12-14 10:42:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48495 to 48331. [2022-12-14 10:42:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48331 states, 40836 states have (on average 1.4968165344304045) internal successors, (61124), 41030 states have internal predecessors, (61124), 5574 states have call successors, (5574), 1921 states have call predecessors, (5574), 1920 states have return successors, (8516), 5380 states have call predecessors, (8516), 5572 states have call successors, (8516) [2022-12-14 10:42:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48331 states to 48331 states and 75214 transitions. [2022-12-14 10:42:05,191 INFO L78 Accepts]: Start accepts. Automaton has 48331 states and 75214 transitions. Word has length 130 [2022-12-14 10:42:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:05,192 INFO L495 AbstractCegarLoop]: Abstraction has 48331 states and 75214 transitions. [2022-12-14 10:42:05,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 10:42:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 48331 states and 75214 transitions. [2022-12-14 10:42:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 10:42:05,221 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:05,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:42:05,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:42:05,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8842eb32-8919-4b6d-98ce-60c4f5b7253f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:42:05,422 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash -802729263, now seen corresponding path program 1 times [2022-12-14 10:42:05,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:05,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778503702] [2022-12-14 10:42:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:05,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:42:05,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:05,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778503702] [2022-12-14 10:42:05,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778503702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:05,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:42:05,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:42:05,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41666520] [2022-12-14 10:42:05,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:05,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:42:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:42:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:05,736 INFO L87 Difference]: Start difference. First operand 48331 states and 75214 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:42:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:11,551 INFO L93 Difference]: Finished difference Result 166099 states and 260245 transitions. [2022-12-14 10:42:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:42:11,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-12-14 10:42:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:11,971 INFO L225 Difference]: With dead ends: 166099 [2022-12-14 10:42:11,971 INFO L226 Difference]: Without dead ends: 117775 [2022-12-14 10:42:12,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:42:12,106 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 973 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:12,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 811 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:42:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117775 states. [2022-12-14 10:42:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117775 to 94731. [2022-12-14 10:42:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94731 states, 80068 states have (on average 1.490782834590598) internal successors, (119364), 80454 states have internal predecessors, (119364), 10822 states have call successors, (10822), 3841 states have call predecessors, (10822), 3840 states have return successors, (16452), 10436 states have call predecessors, (16452), 10820 states have call successors, (16452) [2022-12-14 10:42:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94731 states to 94731 states and 146638 transitions. [2022-12-14 10:42:17,569 INFO L78 Accepts]: Start accepts. Automaton has 94731 states and 146638 transitions. Word has length 130 [2022-12-14 10:42:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:17,569 INFO L495 AbstractCegarLoop]: Abstraction has 94731 states and 146638 transitions. [2022-12-14 10:42:17,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:42:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 94731 states and 146638 transitions. [2022-12-14 10:42:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 10:42:17,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:17,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:42:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:42:17,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash 438428151, now seen corresponding path program 1 times [2022-12-14 10:42:17,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:17,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656277251] [2022-12-14 10:42:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:17,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:42:17,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:17,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656277251] [2022-12-14 10:42:17,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656277251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:17,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:42:17,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:42:17,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162593109] [2022-12-14 10:42:17,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:17,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:42:17,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:42:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:17,921 INFO L87 Difference]: Start difference. First operand 94731 states and 146638 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:42:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:26,315 INFO L93 Difference]: Finished difference Result 254099 states and 396852 transitions. [2022-12-14 10:42:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:42:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-12-14 10:42:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:26,846 INFO L225 Difference]: With dead ends: 254099 [2022-12-14 10:42:26,846 INFO L226 Difference]: Without dead ends: 159375 [2022-12-14 10:42:27,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:42:27,034 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 896 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:27,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 709 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:42:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159375 states. [2022-12-14 10:42:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159375 to 140811. [2022-12-14 10:42:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140811 states, 118980 states have (on average 1.4859976466633047) internal successors, (176804), 119558 states have internal predecessors, (176804), 16070 states have call successors, (16070), 5761 states have call predecessors, (16070), 5760 states have return successors, (24388), 15492 states have call predecessors, (24388), 16068 states have call successors, (24388) [2022-12-14 10:42:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140811 states to 140811 states and 217262 transitions. [2022-12-14 10:42:35,106 INFO L78 Accepts]: Start accepts. Automaton has 140811 states and 217262 transitions. Word has length 131 [2022-12-14 10:42:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:35,107 INFO L495 AbstractCegarLoop]: Abstraction has 140811 states and 217262 transitions. [2022-12-14 10:42:35,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:42:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 140811 states and 217262 transitions. [2022-12-14 10:42:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 10:42:35,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:35,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:42:35,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:42:35,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1991796497, now seen corresponding path program 1 times [2022-12-14 10:42:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:35,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241693524] [2022-12-14 10:42:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:35,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:42:35,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:35,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241693524] [2022-12-14 10:42:35,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241693524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:35,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:42:35,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:42:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743452800] [2022-12-14 10:42:35,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:42:35,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:42:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:35,472 INFO L87 Difference]: Start difference. First operand 140811 states and 217262 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:42:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:50,546 INFO L93 Difference]: Finished difference Result 394643 states and 614004 transitions. [2022-12-14 10:42:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:42:50,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2022-12-14 10:42:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:51,553 INFO L225 Difference]: With dead ends: 394643 [2022-12-14 10:42:51,553 INFO L226 Difference]: Without dead ends: 253839 [2022-12-14 10:42:51,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:42:51,829 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 956 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:51,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 746 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:42:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253839 states. [2022-12-14 10:43:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253839 to 222987. [2022-12-14 10:43:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222987 states, 188292 states have (on average 1.4789157266373505) internal successors, (278468), 189254 states have internal predecessors, (278468), 25478 states have call successors, (25478), 9217 states have call predecessors, (25478), 9216 states have return successors, (39748), 24516 states have call predecessors, (39748), 25476 states have call successors, (39748) [2022-12-14 10:43:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222987 states to 222987 states and 343694 transitions. [2022-12-14 10:43:06,364 INFO L78 Accepts]: Start accepts. Automaton has 222987 states and 343694 transitions. Word has length 132 [2022-12-14 10:43:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:06,364 INFO L495 AbstractCegarLoop]: Abstraction has 222987 states and 343694 transitions. [2022-12-14 10:43:06,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:43:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 222987 states and 343694 transitions. [2022-12-14 10:43:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 10:43:06,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:06,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:43:06,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:43:06,485 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:06,486 INFO L85 PathProgramCache]: Analyzing trace with hash 702736699, now seen corresponding path program 1 times [2022-12-14 10:43:06,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:06,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525649834] [2022-12-14 10:43:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:06,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:43:06,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525649834] [2022-12-14 10:43:06,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525649834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:06,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:06,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:43:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336333475] [2022-12-14 10:43:06,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:06,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:43:06,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:43:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:43:06,745 INFO L87 Difference]: Start difference. First operand 222987 states and 343694 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:43:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:32,196 INFO L93 Difference]: Finished difference Result 604563 states and 939860 transitions. [2022-12-14 10:43:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:43:32,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 133 [2022-12-14 10:43:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:33,579 INFO L225 Difference]: With dead ends: 604563 [2022-12-14 10:43:33,580 INFO L226 Difference]: Without dead ends: 381583 [2022-12-14 10:43:34,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:43:34,244 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 869 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:34,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 885 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:43:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381583 states. [2022-12-14 10:43:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381583 to 331403. [2022-12-14 10:43:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331403 states, 279748 states have (on average 1.473912235297482) internal successors, (412324), 281190 states have internal predecessors, (412324), 37830 states have call successors, (37830), 13825 states have call predecessors, (37830), 13824 states have return successors, (58900), 36388 states have call predecessors, (58900), 37828 states have call successors, (58900) [2022-12-14 10:43:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331403 states to 331403 states and 509054 transitions. [2022-12-14 10:43:58,520 INFO L78 Accepts]: Start accepts. Automaton has 331403 states and 509054 transitions. Word has length 133 [2022-12-14 10:43:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:58,521 INFO L495 AbstractCegarLoop]: Abstraction has 331403 states and 509054 transitions. [2022-12-14 10:43:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:43:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 331403 states and 509054 transitions. [2022-12-14 10:43:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 10:43:58,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:58,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:43:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:43:58,817 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2095902135, now seen corresponding path program 1 times [2022-12-14 10:43:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:58,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608567842] [2022-12-14 10:43:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:43:59,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:59,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608567842] [2022-12-14 10:43:59,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608567842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:59,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:43:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670205345] [2022-12-14 10:43:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:43:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:43:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:43:59,095 INFO L87 Difference]: Start difference. First operand 331403 states and 509054 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:44:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:54,538 INFO L93 Difference]: Finished difference Result 1095571 states and 1705269 transitions. [2022-12-14 10:44:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:44:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 134 [2022-12-14 10:44:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:57,779 INFO L225 Difference]: With dead ends: 1095571 [2022-12-14 10:44:57,779 INFO L226 Difference]: Without dead ends: 764175 [2022-12-14 10:44:58,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:44:58,815 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 938 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:58,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 637 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:44:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764175 states. [2022-12-14 10:45:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764175 to 648971. [2022-12-14 10:45:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648971 states, 547972 states have (on average 1.4670603607483594) internal successors, (803908), 550854 states have internal predecessors, (803908), 73350 states have call successors, (73350), 27649 states have call predecessors, (73350), 27648 states have return successors, (113476), 70468 states have call predecessors, (113476), 73348 states have call successors, (113476) [2022-12-14 10:45:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648971 states to 648971 states and 990734 transitions. [2022-12-14 10:45:52,677 INFO L78 Accepts]: Start accepts. Automaton has 648971 states and 990734 transitions. Word has length 134 [2022-12-14 10:45:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:45:52,678 INFO L495 AbstractCegarLoop]: Abstraction has 648971 states and 990734 transitions. [2022-12-14 10:45:52,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:45:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 648971 states and 990734 transitions. [2022-12-14 10:45:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 10:45:53,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:45:53,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:45:53,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:45:53,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:45:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:45:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -988796925, now seen corresponding path program 1 times [2022-12-14 10:45:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:45:53,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795799476] [2022-12-14 10:45:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:45:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:45:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:45:53,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:45:53,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795799476] [2022-12-14 10:45:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795799476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:45:53,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:45:53,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:45:53,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476403141] [2022-12-14 10:45:53,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:45:53,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:45:53,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:45:53,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:45:53,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:45:53,446 INFO L87 Difference]: Start difference. First operand 648971 states and 990734 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 10:47:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:47:24,573 INFO L93 Difference]: Finished difference Result 1712275 states and 2644436 transitions. [2022-12-14 10:47:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:47:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 135 [2022-12-14 10:47:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:47:29,759 INFO L225 Difference]: With dead ends: 1712275 [2022-12-14 10:47:29,759 INFO L226 Difference]: Without dead ends: 1063311 [2022-12-14 10:47:32,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:47:32,026 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 818 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:47:32,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 840 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:47:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063311 states.