./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87df5a94129a3baa1e2e3650ee6bffcda9607641da2006311f5769f81726e25d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:26:53,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:26:53,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:26:53,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:26:53,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:26:53,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:26:53,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:26:53,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:26:53,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:26:53,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:26:53,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:26:53,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:26:53,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:26:53,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:26:53,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:26:53,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:26:53,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:26:53,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:26:53,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:26:53,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:26:53,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:26:53,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:26:53,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:26:53,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:26:53,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:26:53,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:26:53,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:26:53,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:26:53,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:26:53,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:26:53,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:26:53,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:26:53,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:26:53,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:26:53,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:26:53,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:26:53,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:26:53,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:26:53,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:26:53,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:26:53,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:26:53,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:26:53,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:26:53,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:26:53,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:26:53,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:26:53,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:26:53,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:26:53,932 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:26:53,932 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:26:53,933 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:26:53,933 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:26:53,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:26:53,934 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:26:53,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:26:53,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:26:53,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:26:53,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:26:53,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:26:53,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:26:53,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:26:53,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:26:53,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:26:53,936 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:26:53,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:26:53,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:26:53,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:26:53,936 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_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87df5a94129a3baa1e2e3650ee6bffcda9607641da2006311f5769f81726e25d [2022-12-14 06:26:54,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:26:54,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:26:54,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:26:54,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:26:54,161 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:26:54,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c [2022-12-14 06:26:56,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:26:57,216 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:26:57,217 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c [2022-12-14 06:26:57,251 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/data/3e4019fac/25f8afac0d454b35add983d4fdd8088d/FLAG73b3a8e28 [2022-12-14 06:26:57,262 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/data/3e4019fac/25f8afac0d454b35add983d4fdd8088d [2022-12-14 06:26:57,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:26:57,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:26:57,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:26:57,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:26:57,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:26:57,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:26:57" (1/1) ... [2022-12-14 06:26:57,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b500f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:26:57, skipping insertion in model container [2022-12-14 06:26:57,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:26:57" (1/1) ... [2022-12-14 06:26:57,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:26:57,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:26:58,993 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_93d1ff56-0ee0-4e8a-863c-ee8beb488164/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[381679,381692] [2022-12-14 06:26:59,019 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_93d1ff56-0ee0-4e8a-863c-ee8beb488164/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[383339,383352] [2022-12-14 06:26:59,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:26:59,288 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:27:00,121 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_93d1ff56-0ee0-4e8a-863c-ee8beb488164/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[381679,381692] [2022-12-14 06:27:00,123 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_93d1ff56-0ee0-4e8a-863c-ee8beb488164/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-2.c[383339,383352] [2022-12-14 06:27:00,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:27:00,172 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:27:00,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00 WrapperNode [2022-12-14 06:27:00,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:27:00,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:27:00,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:27:00,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:27:00,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,520 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2022-12-14 06:27:00,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:27:00,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:27:00,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:27:00,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:27:00,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:27:00,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:27:00,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:27:00,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:27:00,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (1/1) ... [2022-12-14 06:27:00,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:27:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:00,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:27:00,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:27:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:27:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:27:00,898 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:27:00,898 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:27:00,898 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:27:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:27:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:27:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:27:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:27:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:27:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:27:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:27:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:27:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:27:00,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:27:00,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:27:00,997 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:27:00,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:27:07,046 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:27:08,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:27:08,458 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-12-14 06:27:08,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:27:08 BoogieIcfgContainer [2022-12-14 06:27:08,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:27:08,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:27:08,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:27:08,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:27:08,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:26:57" (1/3) ... [2022-12-14 06:27:08,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766b6e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:27:08, skipping insertion in model container [2022-12-14 06:27:08,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:27:00" (2/3) ... [2022-12-14 06:27:08,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766b6e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:27:08, skipping insertion in model container [2022-12-14 06:27:08,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:27:08" (3/3) ... [2022-12-14 06:27:08,470 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.10.cil-2.c [2022-12-14 06:27:08,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:27:08,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:27:08,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:27:08,553 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;@71af403c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:27:08,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:27:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 06:27:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:27:08,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:08,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:08,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:08,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1380541481, now seen corresponding path program 1 times [2022-12-14 06:27:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056334410] [2022-12-14 06:27:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:27:08,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056334410] [2022-12-14 06:27:08,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056334410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:08,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:08,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:27:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413898880] [2022-12-14 06:27:08,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:27:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:27:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:27:09,010 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:27:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:09,776 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2022-12-14 06:27:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:27:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2022-12-14 06:27:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:09,804 INFO L225 Difference]: With dead ends: 3767 [2022-12-14 06:27:09,804 INFO L226 Difference]: Without dead ends: 1957 [2022-12-14 06:27:09,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:27:09,817 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:09,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:27:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-12-14 06:27:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2022-12-14 06:27:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 06:27:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2022-12-14 06:27:09,938 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2022-12-14 06:27:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:09,938 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2022-12-14 06:27:09,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:27:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2022-12-14 06:27:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:27:09,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:09,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:27:09,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -881840582, now seen corresponding path program 1 times [2022-12-14 06:27:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857275302] [2022-12-14 06:27:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:27:10,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857275302] [2022-12-14 06:27:10,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857275302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186116193] [2022-12-14 06:27:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:10,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:10,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:27:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:10,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:27:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:27:10,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:27:10,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186116193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:10,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:27:10,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:27:10,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524225877] [2022-12-14 06:27:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:10,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:27:10,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:27:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:10,508 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:10,910 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2022-12-14 06:27:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:27:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:27:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:10,922 INFO L225 Difference]: With dead ends: 2569 [2022-12-14 06:27:10,922 INFO L226 Difference]: Without dead ends: 2259 [2022-12-14 06:27:10,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:10,925 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:10,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:27:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-12-14 06:27:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2022-12-14 06:27:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-12-14 06:27:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2022-12-14 06:27:11,005 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2022-12-14 06:27:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:11,005 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2022-12-14 06:27:11,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2022-12-14 06:27:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:27:11,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:11,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:11,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:27:11,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 06:27:11,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1381662874, now seen corresponding path program 1 times [2022-12-14 06:27:11,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:11,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342438237] [2022-12-14 06:27:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:11,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:27:11,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342438237] [2022-12-14 06:27:11,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342438237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297885960] [2022-12-14 06:27:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:11,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:11,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:11,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:11,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:27:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:27:11,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:27:11,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:27:11,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297885960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:11,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:27:11,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:27:11,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681473945] [2022-12-14 06:27:11,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:11,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:27:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:27:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:11,578 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:11,986 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2022-12-14 06:27:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:27:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:27:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:12,001 INFO L225 Difference]: With dead ends: 3460 [2022-12-14 06:27:12,001 INFO L226 Difference]: Without dead ends: 2851 [2022-12-14 06:27:12,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:12,006 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:12,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:27:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2022-12-14 06:27:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2022-12-14 06:27:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-14 06:27:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2022-12-14 06:27:12,112 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2022-12-14 06:27:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:12,112 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2022-12-14 06:27:12,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2022-12-14 06:27:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:27:12,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:12,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:12,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 06:27:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 06:27:12,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 863781626, now seen corresponding path program 1 times [2022-12-14 06:27:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:12,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652037663] [2022-12-14 06:27:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:27:12,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652037663] [2022-12-14 06:27:12,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652037663] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814263432] [2022-12-14 06:27:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:12,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:12,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:12,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:12,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:27:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:27:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:27:12,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:27:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814263432] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:12,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:27:12,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:27:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438952978] [2022-12-14 06:27:12,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:12,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:27:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:27:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:12,677 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:13,191 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2022-12-14 06:27:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:27:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:27:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:13,224 INFO L225 Difference]: With dead ends: 5218 [2022-12-14 06:27:13,224 INFO L226 Difference]: Without dead ends: 4019 [2022-12-14 06:27:13,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:13,231 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:13,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:27:13,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2022-12-14 06:27:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2022-12-14 06:27:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-14 06:27:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2022-12-14 06:27:13,367 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2022-12-14 06:27:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:13,367 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2022-12-14 06:27:13,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2022-12-14 06:27:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:27:13,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:13,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:13,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:27:13,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:13,574 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1192934746, now seen corresponding path program 1 times [2022-12-14 06:27:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427812014] [2022-12-14 06:27:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:27:13,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:13,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427812014] [2022-12-14 06:27:13,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427812014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887016307] [2022-12-14 06:27:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:13,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:13,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:13,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:13,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:27:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:27:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:27:13,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:27:13,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887016307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:13,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:27:13,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:27:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929489846] [2022-12-14 06:27:13,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:13,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:27:13,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:27:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:13,900 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:14,361 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2022-12-14 06:27:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:27:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:27:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:14,382 INFO L225 Difference]: With dead ends: 8686 [2022-12-14 06:27:14,382 INFO L226 Difference]: Without dead ends: 6323 [2022-12-14 06:27:14,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:14,390 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:14,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:27:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-12-14 06:27:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2022-12-14 06:27:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-12-14 06:27:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2022-12-14 06:27:14,539 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2022-12-14 06:27:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:14,540 INFO L495 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2022-12-14 06:27:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2022-12-14 06:27:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:27:14,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:14,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:14,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:27:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:14,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1583195898, now seen corresponding path program 1 times [2022-12-14 06:27:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887031234] [2022-12-14 06:27:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:27:14,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:14,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887031234] [2022-12-14 06:27:14,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887031234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:14,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472745683] [2022-12-14 06:27:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:14,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:14,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:14,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:27:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:14,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:27:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:27:15,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:27:15,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472745683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:15,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:27:15,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:27:15,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886633617] [2022-12-14 06:27:15,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:15,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:27:15,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:27:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:15,033 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:15,630 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2022-12-14 06:27:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:27:15,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:27:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:15,671 INFO L225 Difference]: With dead ends: 15526 [2022-12-14 06:27:15,671 INFO L226 Difference]: Without dead ends: 10867 [2022-12-14 06:27:15,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:15,683 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:15,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:27:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2022-12-14 06:27:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2022-12-14 06:27:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-12-14 06:27:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2022-12-14 06:27:15,963 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2022-12-14 06:27:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:15,963 INFO L495 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2022-12-14 06:27:15,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:27:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2022-12-14 06:27:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:27:15,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:15,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:15,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:27:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93d1ff56-0ee0-4e8a-863c-ee8beb488164/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:27:16,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 588820826, now seen corresponding path program 1 times [2022-12-14 06:27:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396889599] [2022-12-14 06:27:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:27:16,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:16,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396889599] [2022-12-14 06:27:16,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396889599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:16,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:16,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:27:16,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247239966] [2022-12-14 06:27:16,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:16,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:27:16,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:27:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:16,653 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:18,009 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2022-12-14 06:27:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:27:18,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-12-14 06:27:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:18,054 INFO L225 Difference]: With dead ends: 26597 [2022-12-14 06:27:18,054 INFO L226 Difference]: Without dead ends: 17411 [2022-12-14 06:27:18,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:27:18,069 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4031 mSDsluCounter, 9794 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4037 SdHoareTripleChecker+Valid, 13094 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:18,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4037 Valid, 13094 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:27:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2022-12-14 06:27:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2022-12-14 06:27:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-12-14 06:27:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2022-12-14 06:27:18,538 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2022-12-14 06:27:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:18,538 INFO L495 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2022-12-14 06:27:18,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2022-12-14 06:27:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:27:18,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:18,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:18,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:27:18,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1595276971, now seen corresponding path program 1 times [2022-12-14 06:27:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:18,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893361243] [2022-12-14 06:27:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:18,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:27:18,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893361243] [2022-12-14 06:27:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893361243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:18,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:27:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654628204] [2022-12-14 06:27:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:18,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:27:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:27:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:18,966 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:20,486 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2022-12-14 06:27:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:27:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-12-14 06:27:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:20,538 INFO L225 Difference]: With dead ends: 36973 [2022-12-14 06:27:20,538 INFO L226 Difference]: Without dead ends: 23323 [2022-12-14 06:27:20,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:27:20,563 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3977 mSDsluCounter, 9680 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3983 SdHoareTripleChecker+Valid, 12952 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:20,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3983 Valid, 12952 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:27:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2022-12-14 06:27:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2022-12-14 06:27:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2022-12-14 06:27:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2022-12-14 06:27:21,318 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2022-12-14 06:27:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:21,318 INFO L495 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2022-12-14 06:27:21,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2022-12-14 06:27:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 06:27:21,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:21,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:21,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:27:21,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1469990722, now seen corresponding path program 1 times [2022-12-14 06:27:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:21,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127135318] [2022-12-14 06:27:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:21,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:27:21,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:21,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127135318] [2022-12-14 06:27:21,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127135318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:21,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:21,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:27:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379023448] [2022-12-14 06:27:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:27:21,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:27:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:21,675 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:24,158 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2022-12-14 06:27:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:27:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-12-14 06:27:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:24,321 INFO L225 Difference]: With dead ends: 72237 [2022-12-14 06:27:24,321 INFO L226 Difference]: Without dead ends: 51955 [2022-12-14 06:27:24,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:27:24,350 INFO L413 NwaCegarLoop]: 3282 mSDtfsCounter, 4219 mSDsluCounter, 6504 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4238 SdHoareTripleChecker+Valid, 9786 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:24,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4238 Valid, 9786 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:27:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2022-12-14 06:27:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2022-12-14 06:27:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-12-14 06:27:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2022-12-14 06:27:26,521 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2022-12-14 06:27:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:26,522 INFO L495 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2022-12-14 06:27:26,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2022-12-14 06:27:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:27:26,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:26,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:26,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:27:26,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1383951229, now seen corresponding path program 1 times [2022-12-14 06:27:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:26,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104477010] [2022-12-14 06:27:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:27:26,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:26,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104477010] [2022-12-14 06:27:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104477010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:26,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:26,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:27:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015045002] [2022-12-14 06:27:26,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:27:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:27:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:26,913 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:30,806 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2022-12-14 06:27:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:27:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-12-14 06:27:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:31,031 INFO L225 Difference]: With dead ends: 108861 [2022-12-14 06:27:31,031 INFO L226 Difference]: Without dead ends: 69163 [2022-12-14 06:27:31,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:27:31,115 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4040 mSDsluCounter, 9740 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4046 SdHoareTripleChecker+Valid, 13012 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:31,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4046 Valid, 13012 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:27:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2022-12-14 06:27:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2022-12-14 06:27:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2022-12-14 06:27:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2022-12-14 06:27:34,349 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2022-12-14 06:27:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:34,350 INFO L495 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2022-12-14 06:27:34,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2022-12-14 06:27:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 06:27:34,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:34,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:34,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:27:34,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash 464753814, now seen corresponding path program 1 times [2022-12-14 06:27:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:34,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628557594] [2022-12-14 06:27:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:34,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:27:34,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628557594] [2022-12-14 06:27:34,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628557594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:34,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:34,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:27:34,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510384231] [2022-12-14 06:27:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:34,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:27:34,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:27:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:34,634 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:40,777 INFO L93 Difference]: Finished difference Result 157785 states and 232457 transitions. [2022-12-14 06:27:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:27:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-12-14 06:27:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:41,026 INFO L225 Difference]: With dead ends: 157785 [2022-12-14 06:27:41,027 INFO L226 Difference]: Without dead ends: 98815 [2022-12-14 06:27:41,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:27:41,113 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4007 mSDsluCounter, 9710 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4013 SdHoareTripleChecker+Valid, 12982 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:27:41,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4013 Valid, 12982 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:27:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98815 states. [2022-12-14 06:27:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98815 to 89237. [2022-12-14 06:27:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89237 states, 74759 states have (on average 1.4623924878609933) internal successors, (109327), 75085 states have internal predecessors, (109327), 10588 states have call successors, (10588), 3888 states have call predecessors, (10588), 3888 states have return successors, (10588), 10264 states have call predecessors, (10588), 10588 states have call successors, (10588) [2022-12-14 06:27:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89237 states to 89237 states and 130503 transitions. [2022-12-14 06:27:46,686 INFO L78 Accepts]: Start accepts. Automaton has 89237 states and 130503 transitions. Word has length 126 [2022-12-14 06:27:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:46,686 INFO L495 AbstractCegarLoop]: Abstraction has 89237 states and 130503 transitions. [2022-12-14 06:27:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 89237 states and 130503 transitions. [2022-12-14 06:27:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 06:27:46,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:46,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:27:46,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:27:46,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash -578314723, now seen corresponding path program 1 times [2022-12-14 06:27:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:46,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410248271] [2022-12-14 06:27:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:46,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:27:46,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410248271] [2022-12-14 06:27:46,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410248271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:27:46,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:27:46,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:27:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789103480] [2022-12-14 06:27:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:27:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:27:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:27:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:27:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:27:46,984 INFO L87 Difference]: Start difference. First operand 89237 states and 130503 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:27:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:27:59,208 INFO L93 Difference]: Finished difference Result 284073 states and 416922 transitions. [2022-12-14 06:27:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:27:59,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2022-12-14 06:27:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:27:59,874 INFO L225 Difference]: With dead ends: 284073 [2022-12-14 06:27:59,874 INFO L226 Difference]: Without dead ends: 196483 [2022-12-14 06:28:00,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:28:00,022 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 4040 mSDsluCounter, 9618 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4059 SdHoareTripleChecker+Valid, 12878 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:00,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4059 Valid, 12878 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:28:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196483 states. [2022-12-14 06:28:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196483 to 172937. [2022-12-14 06:28:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172937 states, 144635 states have (on average 1.448826355999585) internal successors, (209551), 145285 states have internal predecessors, (209551), 20524 states have call successors, (20524), 7776 states have call predecessors, (20524), 7776 states have return successors, (20524), 19876 states have call predecessors, (20524), 20524 states have call successors, (20524) [2022-12-14 06:28:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172937 states to 172937 states and 250599 transitions. [2022-12-14 06:28:10,520 INFO L78 Accepts]: Start accepts. Automaton has 172937 states and 250599 transitions. Word has length 127 [2022-12-14 06:28:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:10,521 INFO L495 AbstractCegarLoop]: Abstraction has 172937 states and 250599 transitions. [2022-12-14 06:28:10,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:28:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 172937 states and 250599 transitions. [2022-12-14 06:28:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 06:28:10,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:10,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:10,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:28:10,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash 170761594, now seen corresponding path program 1 times [2022-12-14 06:28:10,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:10,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427072341] [2022-12-14 06:28:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:28:10,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:10,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427072341] [2022-12-14 06:28:10,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427072341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:10,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:28:10,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:28:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432563796] [2022-12-14 06:28:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:10,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:28:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:28:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:28:10,841 INFO L87 Difference]: Start difference. First operand 172937 states and 250599 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:28:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:34,221 INFO L93 Difference]: Finished difference Result 507741 states and 732281 transitions. [2022-12-14 06:28:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:28:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-12-14 06:28:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:35,553 INFO L225 Difference]: With dead ends: 507741 [2022-12-14 06:28:35,553 INFO L226 Difference]: Without dead ends: 336451 [2022-12-14 06:28:35,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:28:35,947 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 7351 mSDsluCounter, 6410 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7370 SdHoareTripleChecker+Valid, 9674 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:35,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7370 Valid, 9674 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:28:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336451 states. [2022-12-14 06:28:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336451 to 336449. [2022-12-14 06:28:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336449 states, 281147 states have (on average 1.4375646903577133) internal successors, (404167), 282445 states have internal predecessors, (404167), 39748 states have call successors, (39748), 15552 states have call predecessors, (39748), 15552 states have return successors, (39748), 38452 states have call predecessors, (39748), 39748 states have call successors, (39748) [2022-12-14 06:28:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336449 states to 336449 states and 483663 transitions. [2022-12-14 06:28:59,536 INFO L78 Accepts]: Start accepts. Automaton has 336449 states and 483663 transitions. Word has length 128 [2022-12-14 06:28:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:59,536 INFO L495 AbstractCegarLoop]: Abstraction has 336449 states and 483663 transitions. [2022-12-14 06:28:59,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:28:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 336449 states and 483663 transitions. [2022-12-14 06:28:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 06:28:59,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:59,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:28:59,791 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash 468412357, now seen corresponding path program 1 times [2022-12-14 06:28:59,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:59,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500107534] [2022-12-14 06:28:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:29:00,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500107534] [2022-12-14 06:29:00,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500107534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:00,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:00,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:29:00,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534800432] [2022-12-14 06:29:00,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:00,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:29:00,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:29:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:29:00,026 INFO L87 Difference]: Start difference. First operand 336449 states and 483663 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:29:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:52,361 INFO L93 Difference]: Finished difference Result 1044933 states and 1512690 transitions. [2022-12-14 06:29:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:29:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-12-14 06:29:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:55,133 INFO L225 Difference]: With dead ends: 1044933 [2022-12-14 06:29:55,134 INFO L226 Difference]: Without dead ends: 710131 [2022-12-14 06:29:55,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:29:55,902 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3993 mSDsluCounter, 6453 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4012 SdHoareTripleChecker+Valid, 9713 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:55,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4012 Valid, 9713 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:29:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710131 states. [2022-12-14 06:30:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710131 to 655697. [2022-12-14 06:30:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655697 states, 547691 states have (on average 1.427328548396815) internal successors, (781735), 550285 states have internal predecessors, (781735), 76900 states have call successors, (76900), 31104 states have call predecessors, (76900), 31104 states have return successors, (76900), 74308 states have call predecessors, (76900), 76900 states have call successors, (76900) [2022-12-14 06:30:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655697 states to 655697 states and 935535 transitions. [2022-12-14 06:30:45,641 INFO L78 Accepts]: Start accepts. Automaton has 655697 states and 935535 transitions. Word has length 129 [2022-12-14 06:30:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:30:45,641 INFO L495 AbstractCegarLoop]: Abstraction has 655697 states and 935535 transitions. [2022-12-14 06:30:45,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:30:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 655697 states and 935535 transitions. [2022-12-14 06:30:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:30:46,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:30:46,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:30:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:30:46,177 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:30:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:30:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1540430134, now seen corresponding path program 1 times [2022-12-14 06:30:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:30:46,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485003480] [2022-12-14 06:30:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:30:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:30:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:30:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:30:46,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:30:46,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485003480] [2022-12-14 06:30:46,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485003480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:30:46,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:30:46,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:30:46,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105492288] [2022-12-14 06:30:46,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:30:46,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:30:46,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:30:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:30:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:30:46,554 INFO L87 Difference]: Start difference. First operand 655697 states and 935535 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:32:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:29,379 INFO L93 Difference]: Finished difference Result 1963797 states and 2825106 transitions. [2022-12-14 06:32:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:32:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-12-14 06:32:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:34,720 INFO L225 Difference]: With dead ends: 1963797 [2022-12-14 06:32:34,721 INFO L226 Difference]: Without dead ends: 1309747 [2022-12-14 06:32:36,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:32:36,791 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 3924 mSDsluCounter, 6443 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3943 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:32:36,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3943 Valid, 9703 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:32:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309747 states. [2022-12-14 06:34:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309747 to 1278641. [2022-12-14 06:34:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278641 states, 1067819 states have (on average 1.4174153110218117) internal successors, (1513543), 1073005 states have internal predecessors, (1513543), 148612 states have call successors, (148612), 62208 states have call predecessors, (148612), 62208 states have return successors, (148612), 143428 states have call predecessors, (148612), 148612 states have call successors, (148612)