./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba --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 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f --- 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-b5237d8 [2022-11-22 02:46:31,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:46:31,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:46:31,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:46:31,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:46:31,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:46:31,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:46:31,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:46:31,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:46:31,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:46:31,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:46:31,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:46:31,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:46:31,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:46:31,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:46:31,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:46:31,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:46:31,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:46:31,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:46:31,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:46:31,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:46:31,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:46:31,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:46:31,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:46:31,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:46:31,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:46:31,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:46:31,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:46:31,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:46:31,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:46:31,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:46:31,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:46:31,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:46:31,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:46:31,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:46:31,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:46:31,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:46:31,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:46:31,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:46:31,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:46:31,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:46:31,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:46:31,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:46:31,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:46:31,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:46:31,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:46:31,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:46:31,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:46:31,974 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:46:31,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:46:31,975 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:46:31,975 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:46:31,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:46:31,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:46:31,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:46:31,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:46:31,977 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:46:31,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:46:31,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:46:31,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:46:31,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:46:31,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:46:31,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:46:31,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:46:31,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:46:31,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:46:31,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:46:31,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:46:31,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:46:31,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:46:31,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:46:31,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:46:31,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:46:31,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:46:31,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:46:31,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:46:31,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:46:31,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:46:31,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:46:31,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:46:31,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:46:31,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:46:31,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:46:31,985 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_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f [2022-11-22 02:46:32,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:46:32,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:46:32,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:46:32,295 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:46:32,295 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:46:32,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 02:46:35,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:46:35,630 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:46:35,631 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 02:46:35,649 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/data/053e00a2e/21b381e0a5f74b35be71f09bccb21d90/FLAG191f7ea5a [2022-11-22 02:46:35,664 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/data/053e00a2e/21b381e0a5f74b35be71f09bccb21d90 [2022-11-22 02:46:35,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:46:35,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:46:35,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:46:35,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:46:35,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:46:35,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:46:35" (1/1) ... [2022-11-22 02:46:35,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19867439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:35, skipping insertion in model container [2022-11-22 02:46:35,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:46:35" (1/1) ... [2022-11-22 02:46:35,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:46:35,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:46:35,953 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_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-11-22 02:46:35,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:46:36,016 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:46:36,050 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-11-22 02:46:36,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:46:36,084 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:46:36,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36 WrapperNode [2022-11-22 02:46:36,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:46:36,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:46:36,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:46:36,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:46:36,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,130 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 423 [2022-11-22 02:46:36,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:46:36,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:46:36,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:46:36,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:46:36,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:46:36,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:46:36,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:46:36,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:46:36,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (1/1) ... [2022-11-22 02:46:36,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:46:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:36,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:46:36,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:46:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:46:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:46:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:46:36,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:46:36,472 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:46:36,474 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:46:36,973 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:46:37,234 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:46:37,235 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:46:37,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:46:37 BoogieIcfgContainer [2022-11-22 02:46:37,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:46:37,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:46:37,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:46:37,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:46:37,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:46:35" (1/3) ... [2022-11-22 02:46:37,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a290a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:46:37, skipping insertion in model container [2022-11-22 02:46:37,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:36" (2/3) ... [2022-11-22 02:46:37,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a290a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:46:37, skipping insertion in model container [2022-11-22 02:46:37,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:46:37" (3/3) ... [2022-11-22 02:46:37,251 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 02:46:37,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:46:37,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:46:37,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:46:37,341 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;@10e73b49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:46:37,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:46:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:46:37,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:37,355 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] [2022-11-22 02:46:37,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2023666919, now seen corresponding path program 1 times [2022-11-22 02:46:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:37,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136744695] [2022-11-22 02:46:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:37,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:37,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136744695] [2022-11-22 02:46:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136744695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:37,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:37,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:46:37,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759159683] [2022-11-22 02:46:37,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:46:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:46:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:46:37,814 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:37,936 INFO L93 Difference]: Finished difference Result 189 states and 292 transitions. [2022-11-22 02:46:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:46:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 02:46:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:37,952 INFO L225 Difference]: With dead ends: 189 [2022-11-22 02:46:37,952 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 02:46:37,955 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 [2022-11-22 02:46:37,958 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 101 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:37,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 259 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:46:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 02:46:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-22 02:46:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4112903225806452) internal successors, (175), 124 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 175 transitions. [2022-11-22 02:46:38,005 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 175 transitions. Word has length 37 [2022-11-22 02:46:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:38,005 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 175 transitions. [2022-11-22 02:46:38,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 175 transitions. [2022-11-22 02:46:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:46:38,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:38,007 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] [2022-11-22 02:46:38,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:46:38,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1640261836, now seen corresponding path program 1 times [2022-11-22 02:46:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:38,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671832780] [2022-11-22 02:46:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:38,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671832780] [2022-11-22 02:46:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671832780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:38,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:38,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:46:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097977608] [2022-11-22 02:46:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:38,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:46:38,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:46:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:46:38,212 INFO L87 Difference]: Start difference. First operand 125 states and 175 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:38,335 INFO L93 Difference]: Finished difference Result 301 states and 439 transitions. [2022-11-22 02:46:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:46:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-22 02:46:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:38,338 INFO L225 Difference]: With dead ends: 301 [2022-11-22 02:46:38,338 INFO L226 Difference]: Without dead ends: 202 [2022-11-22 02:46:38,339 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 [2022-11-22 02:46:38,341 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 76 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:38,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:46:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-22 02:46:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-11-22 02:46:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4422110552763818) internal successors, (287), 199 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2022-11-22 02:46:38,376 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 40 [2022-11-22 02:46:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:38,376 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2022-11-22 02:46:38,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2022-11-22 02:46:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:46:38,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:38,378 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] [2022-11-22 02:46:38,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:46:38,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2012514755, now seen corresponding path program 1 times [2022-11-22 02:46:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:38,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220130255] [2022-11-22 02:46:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:38,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:38,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220130255] [2022-11-22 02:46:38,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220130255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:38,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:38,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:46:38,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470347676] [2022-11-22 02:46:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:38,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:46:38,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:46:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:46:38,467 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:38,545 INFO L93 Difference]: Finished difference Result 504 states and 741 transitions. [2022-11-22 02:46:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:46:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-22 02:46:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:38,549 INFO L225 Difference]: With dead ends: 504 [2022-11-22 02:46:38,549 INFO L226 Difference]: Without dead ends: 330 [2022-11-22 02:46:38,550 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 [2022-11-22 02:46:38,552 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 71 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:38,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:46:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-22 02:46:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-11-22 02:46:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.452599388379205) internal successors, (475), 327 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 475 transitions. [2022-11-22 02:46:38,607 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 475 transitions. Word has length 43 [2022-11-22 02:46:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:38,608 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 475 transitions. [2022-11-22 02:46:38,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 475 transitions. [2022-11-22 02:46:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:46:38,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:38,610 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] [2022-11-22 02:46:38,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:46:38,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:38,611 INFO L85 PathProgramCache]: Analyzing trace with hash 125802477, now seen corresponding path program 1 times [2022-11-22 02:46:38,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:38,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025836516] [2022-11-22 02:46:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:38,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:38,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025836516] [2022-11-22 02:46:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025836516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:38,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:38,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:46:38,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560100432] [2022-11-22 02:46:38,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:46:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:46:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:46:38,692 INFO L87 Difference]: Start difference. First operand 328 states and 475 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:38,824 INFO L93 Difference]: Finished difference Result 844 states and 1237 transitions. [2022-11-22 02:46:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:46:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-22 02:46:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:38,829 INFO L225 Difference]: With dead ends: 844 [2022-11-22 02:46:38,829 INFO L226 Difference]: Without dead ends: 542 [2022-11-22 02:46:38,830 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 [2022-11-22 02:46:38,831 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:38,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:46:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-22 02:46:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-11-22 02:46:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4452690166975881) internal successors, (779), 539 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 779 transitions. [2022-11-22 02:46:38,934 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 779 transitions. Word has length 46 [2022-11-22 02:46:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:38,935 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 779 transitions. [2022-11-22 02:46:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 779 transitions. [2022-11-22 02:46:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:46:38,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:38,944 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] [2022-11-22 02:46:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:46:38,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1177829407, now seen corresponding path program 1 times [2022-11-22 02:46:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:38,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729235656] [2022-11-22 02:46:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:38,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:39,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:39,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729235656] [2022-11-22 02:46:39,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729235656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:39,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:39,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:46:39,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241126682] [2022-11-22 02:46:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:39,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:46:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:46:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:46:39,202 INFO L87 Difference]: Start difference. First operand 540 states and 779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:39,831 INFO L93 Difference]: Finished difference Result 2244 states and 3247 transitions. [2022-11-22 02:46:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:46:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-22 02:46:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:39,838 INFO L225 Difference]: With dead ends: 2244 [2022-11-22 02:46:39,838 INFO L226 Difference]: Without dead ends: 1730 [2022-11-22 02:46:39,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:46:39,845 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 303 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:39,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 395 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:46:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-11-22 02:46:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1724. [2022-11-22 02:46:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.441091120139292) internal successors, (2483), 1723 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2483 transitions. [2022-11-22 02:46:40,270 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2483 transitions. Word has length 49 [2022-11-22 02:46:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:40,273 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2483 transitions. [2022-11-22 02:46:40,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2483 transitions. [2022-11-22 02:46:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:46:40,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:40,282 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] [2022-11-22 02:46:40,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:46:40,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1105029325, now seen corresponding path program 1 times [2022-11-22 02:46:40,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:40,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034814786] [2022-11-22 02:46:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:40,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:40,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034814786] [2022-11-22 02:46:40,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034814786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:40,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:40,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:46:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637795389] [2022-11-22 02:46:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:40,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:46:40,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:46:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:46:40,789 INFO L87 Difference]: Start difference. First operand 1724 states and 2483 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:41,976 INFO L93 Difference]: Finished difference Result 4370 states and 6402 transitions. [2022-11-22 02:46:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:46:41,976 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-22 02:46:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:41,993 INFO L225 Difference]: With dead ends: 4370 [2022-11-22 02:46:41,993 INFO L226 Difference]: Without dead ends: 4368 [2022-11-22 02:46:41,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:46:42,002 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 954 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:42,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 1140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:46:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2022-11-22 02:46:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 1973. [2022-11-22 02:46:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.4447261663286004) internal successors, (2849), 1972 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2849 transitions. [2022-11-22 02:46:42,526 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2849 transitions. Word has length 51 [2022-11-22 02:46:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:42,526 INFO L495 AbstractCegarLoop]: Abstraction has 1973 states and 2849 transitions. [2022-11-22 02:46:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:46:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2849 transitions. [2022-11-22 02:46:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:46:42,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:42,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:46:42,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1961993484, now seen corresponding path program 1 times [2022-11-22 02:46:42,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421381220] [2022-11-22 02:46:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:42,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:44,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421381220] [2022-11-22 02:46:44,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421381220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:46:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731600766] [2022-11-22 02:46:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:44,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:44,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:46:44,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:46:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:44,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-22 02:46:44,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:46:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:46,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:46:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:58,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731600766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:46:58,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115115292] [2022-11-22 02:46:58,634 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-22 02:46:58,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:46:58,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:46:58,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:46:58,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:46:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:59,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:59,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-22 02:46:59,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:46:59,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:46:59,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:46:59,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-22 02:47:24,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:47:54,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21714#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_19276~0 1) (<= ~send3~0 127) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~p4~0 0) (<= ~st3~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~__return_19276~0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (= ~__return_main~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-22 02:47:54,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:47:54,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:47:54,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-11-22 02:47:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016380517] [2022-11-22 02:47:54,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:47:54,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 02:47:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 02:47:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=7823, Unknown=0, NotChecked=0, Total=9120 [2022-11-22 02:47:54,100 INFO L87 Difference]: Start difference. First operand 1973 states and 2849 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:14,530 INFO L93 Difference]: Finished difference Result 47178 states and 68760 transitions. [2022-11-22 02:50:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2022-11-22 02:50:14,530 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-22 02:50:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:14,709 INFO L225 Difference]: With dead ends: 47178 [2022-11-22 02:50:14,710 INFO L226 Difference]: Without dead ends: 45259 [2022-11-22 02:50:14,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81001 ImplicationChecksByTransitivity, 136.0s TimeCoverageRelationStatistics Valid=27108, Invalid=150554, Unknown=0, NotChecked=0, Total=177662 [2022-11-22 02:50:14,781 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 13218 mSDsluCounter, 6896 mSDsCounter, 0 mSdLazyCounter, 10107 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13218 SdHoareTripleChecker+Valid, 7139 SdHoareTripleChecker+Invalid, 10776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 10107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:14,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13218 Valid, 7139 Invalid, 10776 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [669 Valid, 10107 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2022-11-22 02:50:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45259 states. [2022-11-22 02:50:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45259 to 15420. [2022-11-22 02:50:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15420 states, 15419 states have (on average 1.4206498475906348) internal successors, (21905), 15419 states have internal predecessors, (21905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15420 states to 15420 states and 21905 transitions. [2022-11-22 02:50:22,239 INFO L78 Accepts]: Start accepts. Automaton has 15420 states and 21905 transitions. Word has length 61 [2022-11-22 02:50:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:22,239 INFO L495 AbstractCegarLoop]: Abstraction has 15420 states and 21905 transitions. [2022-11-22 02:50:22,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 15420 states and 21905 transitions. [2022-11-22 02:50:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:50:22,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:22,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:22,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:50:22,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:50:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash -431881859, now seen corresponding path program 1 times [2022-11-22 02:50:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:50:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109097002] [2022-11-22 02:50:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:50:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:50:22,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:50:22,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109097002] [2022-11-22 02:50:22,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109097002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:50:22,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:50:22,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:50:22,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423272142] [2022-11-22 02:50:22,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:50:22,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:50:22,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:50:22,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:50:22,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:50:22,709 INFO L87 Difference]: Start difference. First operand 15420 states and 21905 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:31,548 INFO L93 Difference]: Finished difference Result 37559 states and 53633 transitions. [2022-11-22 02:50:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:50:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-22 02:50:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:31,610 INFO L225 Difference]: With dead ends: 37559 [2022-11-22 02:50:31,611 INFO L226 Difference]: Without dead ends: 22295 [2022-11-22 02:50:31,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:50:31,634 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 433 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:31,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 118 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:50:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22295 states. [2022-11-22 02:50:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22295 to 22293. [2022-11-22 02:50:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22293 states, 22292 states have (on average 1.4175937556073928) internal successors, (31601), 22292 states have internal predecessors, (31601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22293 states to 22293 states and 31601 transitions. [2022-11-22 02:50:41,918 INFO L78 Accepts]: Start accepts. Automaton has 22293 states and 31601 transitions. Word has length 61 [2022-11-22 02:50:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:41,918 INFO L495 AbstractCegarLoop]: Abstraction has 22293 states and 31601 transitions. [2022-11-22 02:50:41,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:50:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22293 states and 31601 transitions. [2022-11-22 02:50:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:50:41,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:41,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:41,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:50:41,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:50:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:41,930 INFO L85 PathProgramCache]: Analyzing trace with hash -296120648, now seen corresponding path program 1 times [2022-11-22 02:50:41,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:50:41,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358664867] [2022-11-22 02:50:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:50:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:43,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:50:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358664867] [2022-11-22 02:50:43,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358664867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:50:43,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846455146] [2022-11-22 02:50:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:43,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:43,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:43,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e0d1af-2c7d-4611-a6c1-82e6d62a3035/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:50:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:43,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-22 02:50:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:50:56,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846455146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:56,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025449208] [2022-11-22 02:50:56,896 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-22 02:50:56,896 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:50:56,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:50:56,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:50:56,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:50:57,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:50:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:50:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:50:57,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-22 02:50:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:57,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-22 02:51:44,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:52:14,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '219626#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_19276~0 1) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~p4~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~__return_19276~0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-22 02:52:14,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:52:14,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:52:14,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-11-22 02:52:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862285693] [2022-11-22 02:52:14,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:52:14,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 02:52:14,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:52:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 02:52:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1292, Invalid=7828, Unknown=0, NotChecked=0, Total=9120 [2022-11-22 02:52:14,434 INFO L87 Difference]: Start difference. First operand 22293 states and 31601 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:56:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:56:08,746 INFO L93 Difference]: Finished difference Result 227232 states and 324543 transitions. [2022-11-22 02:56:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 391 states. [2022-11-22 02:56:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-22 02:56:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:56:09,579 INFO L225 Difference]: With dead ends: 227232 [2022-11-22 02:56:09,579 INFO L226 Difference]: Without dead ends: 204973 [2022-11-22 02:56:09,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106921 ImplicationChecksByTransitivity, 155.4s TimeCoverageRelationStatistics Valid=34303, Invalid=197539, Unknown=0, NotChecked=0, Total=231842 [2022-11-22 02:56:09,691 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 14638 mSDsluCounter, 6665 mSDsCounter, 0 mSdLazyCounter, 10187 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14638 SdHoareTripleChecker+Valid, 6996 SdHoareTripleChecker+Invalid, 10926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 10187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:56:09,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14638 Valid, 6996 Invalid, 10926 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [739 Valid, 10187 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-11-22 02:56:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204973 states.