./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI --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 c8331ae1a542eb033e77244b050255025a53bdff6172fe7667dd71867965088c --- 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-5e519f3 [2022-11-03 02:16:00,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:16:00,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:16:00,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:16:00,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:16:00,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:16:00,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:16:00,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:16:00,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:16:00,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:16:00,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:16:00,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:16:00,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:16:00,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:16:00,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:16:00,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:16:00,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:16:00,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:16:00,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:16:00,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:16:00,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:16:00,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:16:00,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:16:00,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:16:00,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:16:00,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:16:01,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:16:01,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:16:01,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:16:01,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:16:01,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:16:01,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:16:01,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:16:01,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:16:01,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:16:01,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:16:01,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:16:01,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:16:01,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:16:01,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:16:01,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:16:01,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:16:01,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:16:01,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:16:01,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:16:01,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:16:01,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:16:01,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:16:01,041 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:16:01,041 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:16:01,041 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:16:01,042 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:16:01,042 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:16:01,042 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:16:01,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:16:01,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:16:01,043 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:16:01,043 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:16:01,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:16:01,044 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:16:01,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:16:01,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:16:01,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:16:01,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:16:01,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:16:01,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:16:01,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:16:01,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:16:01,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:16:01,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:16:01,048 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:16:01,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:16:01,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:16:01,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:16:01,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:16:01,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:16:01,050 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:16:01,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:16:01,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:16:01,051 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:16:01,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:16:01,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:16:01,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:16:01,052 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_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8331ae1a542eb033e77244b050255025a53bdff6172fe7667dd71867965088c [2022-11-03 02:16:01,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:16:01,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:16:01,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:16:01,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:16:01,330 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:16:01,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c [2022-11-03 02:16:01,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/data/f887bfeb4/a17269f76bb0462a8dc8c8d8f762e26f/FLAGa4a2de11d [2022-11-03 02:16:01,995 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:16:02,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c [2022-11-03 02:16:02,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/data/f887bfeb4/a17269f76bb0462a8dc8c8d8f762e26f/FLAGa4a2de11d [2022-11-03 02:16:02,300 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/data/f887bfeb4/a17269f76bb0462a8dc8c8d8f762e26f [2022-11-03 02:16:02,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:16:02,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:16:02,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:16:02,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:16:02,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:16:02,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:16:02" (1/1) ... [2022-11-03 02:16:02,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30cbef15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:02, skipping insertion in model container [2022-11-03 02:16:02,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:16:02" (1/1) ... [2022-11-03 02:16:02,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:16:02,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:16:02,661 WARN L230 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_927a89e8-087c-4503-aafd-50e4a4b621a4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c[911,924] [2022-11-03 02:16:02,783 WARN L230 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_927a89e8-087c-4503-aafd-50e4a4b621a4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c[8416,8429] [2022-11-03 02:16:02,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:16:02,978 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:16:02,990 WARN L230 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_927a89e8-087c-4503-aafd-50e4a4b621a4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c[911,924] [2022-11-03 02:16:03,008 WARN L230 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_927a89e8-087c-4503-aafd-50e4a4b621a4/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.11.cil-2.c[8416,8429] [2022-11-03 02:16:03,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:16:03,092 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:16:03,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03 WrapperNode [2022-11-03 02:16:03,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:16:03,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:16:03,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:16:03,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:16:03,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,194 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1020 [2022-11-03 02:16:03,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:16:03,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:16:03,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:16:03,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:16:03,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,302 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:16:03,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:16:03,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:16:03,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:16:03,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (1/1) ... [2022-11-03 02:16:03,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:16:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:03,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:16:03,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:16:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:16:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:16:03,424 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:16:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:16:03,424 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:16:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:16:03,425 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:16:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:16:03,425 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:16:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:16:03,425 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:16:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:16:03,426 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:16:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:16:03,427 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:16:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:16:03,428 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:16:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:16:03,428 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:16:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:16:03,429 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:16:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:16:03,429 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:16:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:16:03,430 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:16:03,430 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:16:03,430 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:16:03,431 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:16:03,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:16:03,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:16:03,431 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:16:03,431 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:16:03,610 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:16:03,628 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:16:04,590 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-03 02:16:04,590 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-03 02:16:04,741 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:16:05,306 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:16:05,306 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-11-03 02:16:05,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:16:05 BoogieIcfgContainer [2022-11-03 02:16:05,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:16:05,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:16:05,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:16:05,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:16:05,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:16:02" (1/3) ... [2022-11-03 02:16:05,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5d328e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:16:05, skipping insertion in model container [2022-11-03 02:16:05,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:03" (2/3) ... [2022-11-03 02:16:05,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5d328e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:16:05, skipping insertion in model container [2022-11-03 02:16:05,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:16:05" (3/3) ... [2022-11-03 02:16:05,321 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.11.cil-2.c [2022-11-03 02:16:05,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:16:05,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:16:05,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:16:05,422 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;@6059b43f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:16:05,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:16:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 198 states have (on average 1.5404040404040404) internal successors, (305), 204 states have internal predecessors, (305), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-03 02:16:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:16:05,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:05,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:05,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -409938678, now seen corresponding path program 1 times [2022-11-03 02:16:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:05,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901186285] [2022-11-03 02:16:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:05,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:05,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:05,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901186285] [2022-11-03 02:16:05,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901186285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:05,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:05,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:16:05,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277491002] [2022-11-03 02:16:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:05,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:16:05,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:16:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:05,978 INFO L87 Difference]: Start difference. First operand has 256 states, 198 states have (on average 1.5404040404040404) internal successors, (305), 204 states have internal predecessors, (305), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:06,677 INFO L93 Difference]: Finished difference Result 635 states and 952 transitions. [2022-11-03 02:16:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:16:06,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-03 02:16:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:06,696 INFO L225 Difference]: With dead ends: 635 [2022-11-03 02:16:06,696 INFO L226 Difference]: Without dead ends: 380 [2022-11-03 02:16:06,702 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 [2022-11-03 02:16:06,706 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 439 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:06,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 678 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:16:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-03 02:16:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 369. [2022-11-03 02:16:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 279 states have (on average 1.4516129032258065) internal successors, (405), 283 states have internal predecessors, (405), 61 states have call successors, (61), 28 states have call predecessors, (61), 27 states have return successors, (62), 59 states have call predecessors, (62), 59 states have call successors, (62) [2022-11-03 02:16:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 528 transitions. [2022-11-03 02:16:06,833 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 528 transitions. Word has length 44 [2022-11-03 02:16:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:06,834 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 528 transitions. [2022-11-03 02:16:06,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 528 transitions. [2022-11-03 02:16:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:16:06,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:06,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:16:06,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 462998379, now seen corresponding path program 1 times [2022-11-03 02:16:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:06,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461809850] [2022-11-03 02:16:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:07,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:07,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461809850] [2022-11-03 02:16:07,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461809850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:07,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:07,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:16:07,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558947892] [2022-11-03 02:16:07,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:07,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:16:07,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:07,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:16:07,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:07,015 INFO L87 Difference]: Start difference. First operand 369 states and 528 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:08,190 INFO L93 Difference]: Finished difference Result 906 states and 1251 transitions. [2022-11-03 02:16:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:16:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:16:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:08,195 INFO L225 Difference]: With dead ends: 906 [2022-11-03 02:16:08,195 INFO L226 Difference]: Without dead ends: 440 [2022-11-03 02:16:08,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:16:08,199 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 942 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:08,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 1165 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-03 02:16:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 355. [2022-11-03 02:16:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 265 states have (on average 1.4037735849056603) internal successors, (372), 269 states have internal predecessors, (372), 61 states have call successors, (61), 28 states have call predecessors, (61), 27 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-03 02:16:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 492 transitions. [2022-11-03 02:16:08,238 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 492 transitions. Word has length 45 [2022-11-03 02:16:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:08,239 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 492 transitions. [2022-11-03 02:16:08,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 492 transitions. [2022-11-03 02:16:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:16:08,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:08,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:08,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:16:08,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1123185260, now seen corresponding path program 1 times [2022-11-03 02:16:08,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:08,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479481927] [2022-11-03 02:16:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:08,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:08,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:08,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479481927] [2022-11-03 02:16:08,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479481927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:08,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:08,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111284307] [2022-11-03 02:16:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:08,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:08,635 INFO L87 Difference]: Start difference. First operand 355 states and 492 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:16:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:09,725 INFO L93 Difference]: Finished difference Result 657 states and 860 transitions. [2022-11-03 02:16:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:16:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-03 02:16:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:09,729 INFO L225 Difference]: With dead ends: 657 [2022-11-03 02:16:09,729 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 02:16:09,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:09,732 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 526 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:09,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1007 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 02:16:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 457. [2022-11-03 02:16:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 333 states have (on average 1.3633633633633633) internal successors, (454), 337 states have internal predecessors, (454), 81 states have call successors, (81), 42 states have call predecessors, (81), 41 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-03 02:16:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 614 transitions. [2022-11-03 02:16:09,781 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 614 transitions. Word has length 46 [2022-11-03 02:16:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:09,781 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 614 transitions. [2022-11-03 02:16:09,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:16:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 614 transitions. [2022-11-03 02:16:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:16:09,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:09,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:09,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:16:09,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1387609276, now seen corresponding path program 1 times [2022-11-03 02:16:09,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:09,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557988926] [2022-11-03 02:16:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:09,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:09,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557988926] [2022-11-03 02:16:09,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557988926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:09,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:09,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:16:09,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942736220] [2022-11-03 02:16:09,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:09,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:16:09,868 INFO L87 Difference]: Start difference. First operand 457 states and 614 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:16:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:10,015 INFO L93 Difference]: Finished difference Result 722 states and 950 transitions. [2022-11-03 02:16:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 02:16:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:10,018 INFO L225 Difference]: With dead ends: 722 [2022-11-03 02:16:10,018 INFO L226 Difference]: Without dead ends: 176 [2022-11-03 02:16:10,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:16:10,022 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 339 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:10,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 293 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-03 02:16:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-03 02:16:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 144 states have (on average 1.5208333333333333) internal successors, (219), 145 states have internal predecessors, (219), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 02:16:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 269 transitions. [2022-11-03 02:16:10,044 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 269 transitions. Word has length 47 [2022-11-03 02:16:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:10,044 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 269 transitions. [2022-11-03 02:16:10,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:16:10,045 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 269 transitions. [2022-11-03 02:16:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:16:10,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:10,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:10,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:16:10,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash -902196834, now seen corresponding path program 1 times [2022-11-03 02:16:10,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:10,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766408601] [2022-11-03 02:16:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:10,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766408601] [2022-11-03 02:16:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766408601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:10,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:10,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:16:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608048319] [2022-11-03 02:16:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:10,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:16:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:16:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:16:10,266 INFO L87 Difference]: Start difference. First operand 176 states and 269 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (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) [2022-11-03 02:16:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:11,377 INFO L93 Difference]: Finished difference Result 999 states and 1631 transitions. [2022-11-03 02:16:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:16:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (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 64 [2022-11-03 02:16:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:11,385 INFO L225 Difference]: With dead ends: 999 [2022-11-03 02:16:11,385 INFO L226 Difference]: Without dead ends: 829 [2022-11-03 02:16:11,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:16:11,389 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 1235 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:11,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1231 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:16:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-03 02:16:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 818. [2022-11-03 02:16:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 681 states have (on average 1.5227606461086638) internal successors, (1037), 685 states have internal predecessors, (1037), 106 states have call successors, (106), 30 states have call predecessors, (106), 30 states have return successors, (164), 103 states have call predecessors, (164), 106 states have call successors, (164) [2022-11-03 02:16:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1307 transitions. [2022-11-03 02:16:11,483 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1307 transitions. Word has length 64 [2022-11-03 02:16:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:11,483 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1307 transitions. [2022-11-03 02:16:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (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) [2022-11-03 02:16:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1307 transitions. [2022-11-03 02:16:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:11,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:11,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:11,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:16:11,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1006426375, now seen corresponding path program 1 times [2022-11-03 02:16:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:11,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141823698] [2022-11-03 02:16:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:16:11,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:11,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141823698] [2022-11-03 02:16:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141823698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426343170] [2022-11-03 02:16:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:11,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:11,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:11,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:16:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:16:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:16:12,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:12,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426343170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:12,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:12,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:16:12,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252904774] [2022-11-03 02:16:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:12,204 INFO L87 Difference]: Start difference. First operand 818 states and 1307 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (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) [2022-11-03 02:16:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:12,505 INFO L93 Difference]: Finished difference Result 2426 states and 3994 transitions. [2022-11-03 02:16:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (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 129 [2022-11-03 02:16:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:12,516 INFO L225 Difference]: With dead ends: 2426 [2022-11-03 02:16:12,516 INFO L226 Difference]: Without dead ends: 1614 [2022-11-03 02:16:12,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:12,521 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 217 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:12,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 451 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:16:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-11-03 02:16:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1607. [2022-11-03 02:16:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1343 states have (on average 1.518987341772152) internal successors, (2040), 1350 states have internal predecessors, (2040), 203 states have call successors, (203), 60 states have call predecessors, (203), 60 states have return successors, (315), 197 states have call predecessors, (315), 203 states have call successors, (315) [2022-11-03 02:16:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2558 transitions. [2022-11-03 02:16:12,703 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2558 transitions. Word has length 129 [2022-11-03 02:16:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:12,704 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2558 transitions. [2022-11-03 02:16:12,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (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) [2022-11-03 02:16:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2558 transitions. [2022-11-03 02:16:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:12,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:12,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:12,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:16:12,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash 299883323, now seen corresponding path program 1 times [2022-11-03 02:16:12,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:12,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095347766] [2022-11-03 02:16:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:12,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:16:13,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:13,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095347766] [2022-11-03 02:16:13,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095347766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:13,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237064637] [2022-11-03 02:16:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:13,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:13,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:16:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:16:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:16:13,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:13,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237064637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:13,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:13,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:16:13,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092578407] [2022-11-03 02:16:13,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:13,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:13,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:13,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:13,533 INFO L87 Difference]: Start difference. First operand 1607 states and 2558 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (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) [2022-11-03 02:16:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:14,002 INFO L93 Difference]: Finished difference Result 4778 states and 7830 transitions. [2022-11-03 02:16:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (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 129 [2022-11-03 02:16:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:14,040 INFO L225 Difference]: With dead ends: 4778 [2022-11-03 02:16:14,040 INFO L226 Difference]: Without dead ends: 3177 [2022-11-03 02:16:14,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:14,053 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 241 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:14,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 451 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:16:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2022-11-03 02:16:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 3165. [2022-11-03 02:16:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 2652 states have (on average 1.5143288084464555) internal successors, (4016), 2665 states have internal predecessors, (4016), 392 states have call successors, (392), 120 states have call predecessors, (392), 120 states have return successors, (608), 380 states have call predecessors, (608), 392 states have call successors, (608) [2022-11-03 02:16:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 5016 transitions. [2022-11-03 02:16:14,369 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 5016 transitions. Word has length 129 [2022-11-03 02:16:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:14,370 INFO L495 AbstractCegarLoop]: Abstraction has 3165 states and 5016 transitions. [2022-11-03 02:16:14,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (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) [2022-11-03 02:16:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 5016 transitions. [2022-11-03 02:16:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:14,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:14,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:14,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:16:14,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:16:14,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1772852867, now seen corresponding path program 1 times [2022-11-03 02:16:14,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95055750] [2022-11-03 02:16:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:16:14,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:14,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95055750] [2022-11-03 02:16:14,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95055750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:14,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988456619] [2022-11-03 02:16:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:14,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:14,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:14,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:16:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:16:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:16:15,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:15,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988456619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:15,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:15,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:16:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460392493] [2022-11-03 02:16:15,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:15,131 INFO L87 Difference]: Start difference. First operand 3165 states and 5016 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (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) [2022-11-03 02:16:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:15,784 INFO L93 Difference]: Finished difference Result 9422 states and 15361 transitions. [2022-11-03 02:16:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (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 129 [2022-11-03 02:16:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:15,829 INFO L225 Difference]: With dead ends: 9422 [2022-11-03 02:16:15,829 INFO L226 Difference]: Without dead ends: 6263 [2022-11-03 02:16:15,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:15,852 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 238 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:15,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 451 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2022-11-03 02:16:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6241. [2022-11-03 02:16:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6241 states, 5240 states have (on average 1.5091603053435114) internal successors, (7908), 5265 states have internal predecessors, (7908), 760 states have call successors, (760), 240 states have call predecessors, (760), 240 states have return successors, (1176), 736 states have call predecessors, (1176), 760 states have call successors, (1176) [2022-11-03 02:16:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9844 transitions. [2022-11-03 02:16:16,566 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9844 transitions. Word has length 129 [2022-11-03 02:16:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:16,567 INFO L495 AbstractCegarLoop]: Abstraction has 6241 states and 9844 transitions. [2022-11-03 02:16:16,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (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) [2022-11-03 02:16:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9844 transitions. [2022-11-03 02:16:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:16,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:16,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:16,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:16,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:16,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2141868667, now seen corresponding path program 1 times [2022-11-03 02:16:16,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:16,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270938477] [2022-11-03 02:16:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:16:17,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270938477] [2022-11-03 02:16:17,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270938477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980178057] [2022-11-03 02:16:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:17,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:17,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:17,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:17,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:16:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:16:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:16:17,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:17,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980178057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:17,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:17,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:16:17,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147196808] [2022-11-03 02:16:17,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:17,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:17,400 INFO L87 Difference]: Start difference. First operand 6241 states and 9844 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (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) [2022-11-03 02:16:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:18,492 INFO L93 Difference]: Finished difference Result 18590 states and 30141 transitions. [2022-11-03 02:16:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (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 129 [2022-11-03 02:16:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:18,579 INFO L225 Difference]: With dead ends: 18590 [2022-11-03 02:16:18,579 INFO L226 Difference]: Without dead ends: 12355 [2022-11-03 02:16:18,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:18,615 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 220 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:18,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 451 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:16:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2022-11-03 02:16:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 12313. [2022-11-03 02:16:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 10356 states have (on average 1.503669370413287) internal successors, (15572), 10405 states have internal predecessors, (15572), 1476 states have call successors, (1476), 480 states have call predecessors, (1476), 480 states have return successors, (2276), 1428 states have call predecessors, (2276), 1476 states have call successors, (2276) [2022-11-03 02:16:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 19324 transitions. [2022-11-03 02:16:20,197 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 19324 transitions. Word has length 129 [2022-11-03 02:16:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:20,197 INFO L495 AbstractCegarLoop]: Abstraction has 12313 states and 19324 transitions. [2022-11-03 02:16:20,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (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) [2022-11-03 02:16:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 19324 transitions. [2022-11-03 02:16:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:20,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:20,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:20,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:20,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1715412729, now seen corresponding path program 1 times [2022-11-03 02:16:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:20,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782942792] [2022-11-03 02:16:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:16:20,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782942792] [2022-11-03 02:16:20,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782942792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360897126] [2022-11-03 02:16:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:20,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:20,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:20,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:20,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:16:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:16:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:16:20,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:20,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360897126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:20,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:20,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:16:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511255061] [2022-11-03 02:16:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:21,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:21,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:21,001 INFO L87 Difference]: Start difference. First operand 12313 states and 19324 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (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) [2022-11-03 02:16:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:22,755 INFO L93 Difference]: Finished difference Result 36686 states and 59137 transitions. [2022-11-03 02:16:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (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 129 [2022-11-03 02:16:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:22,894 INFO L225 Difference]: With dead ends: 36686 [2022-11-03 02:16:22,895 INFO L226 Difference]: Without dead ends: 24379 [2022-11-03 02:16:23,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:23,058 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 226 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:23,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 451 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24379 states. [2022-11-03 02:16:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24379 to 24297. [2022-11-03 02:16:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24297 states, 20468 states have (on average 1.4979480164158687) internal successors, (30660), 20565 states have internal predecessors, (30660), 2868 states have call successors, (2868), 960 states have call predecessors, (2868), 960 states have return successors, (4404), 2772 states have call predecessors, (4404), 2868 states have call successors, (4404) [2022-11-03 02:16:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24297 states to 24297 states and 37932 transitions. [2022-11-03 02:16:25,338 INFO L78 Accepts]: Start accepts. Automaton has 24297 states and 37932 transitions. Word has length 129 [2022-11-03 02:16:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:25,339 INFO L495 AbstractCegarLoop]: Abstraction has 24297 states and 37932 transitions. [2022-11-03 02:16:25,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (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) [2022-11-03 02:16:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 24297 states and 37932 transitions. [2022-11-03 02:16:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:25,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:25,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:25,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:16:25,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1906567945, now seen corresponding path program 1 times [2022-11-03 02:16:25,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:25,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059297142] [2022-11-03 02:16:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:16:25,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:25,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059297142] [2022-11-03 02:16:25,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059297142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:25,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444959602] [2022-11-03 02:16:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:25,766 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:25,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:16:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:16:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:16:26,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:26,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444959602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:26,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:26,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:16:26,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178636792] [2022-11-03 02:16:26,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:26,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:26,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:26,095 INFO L87 Difference]: Start difference. First operand 24297 states and 37932 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (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) [2022-11-03 02:16:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:29,338 INFO L93 Difference]: Finished difference Result 72398 states and 116001 transitions. [2022-11-03 02:16:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:29,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (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 129 [2022-11-03 02:16:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:29,581 INFO L225 Difference]: With dead ends: 72398 [2022-11-03 02:16:29,582 INFO L226 Difference]: Without dead ends: 48107 [2022-11-03 02:16:29,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:29,686 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 232 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:29,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 451 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48107 states. [2022-11-03 02:16:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48107 to 47945. [2022-11-03 02:16:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47945 states, 40452 states have (on average 1.4920399485810343) internal successors, (60356), 40645 states have internal predecessors, (60356), 5572 states have call successors, (5572), 1920 states have call predecessors, (5572), 1920 states have return successors, (8516), 5380 states have call predecessors, (8516), 5572 states have call successors, (8516) [2022-11-03 02:16:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47945 states to 47945 states and 74444 transitions. [2022-11-03 02:16:33,480 INFO L78 Accepts]: Start accepts. Automaton has 47945 states and 74444 transitions. Word has length 129 [2022-11-03 02:16:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:33,480 INFO L495 AbstractCegarLoop]: Abstraction has 47945 states and 74444 transitions. [2022-11-03 02:16:33,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (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) [2022-11-03 02:16:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 47945 states and 74444 transitions. [2022-11-03 02:16:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:16:33,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:33,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:33,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:33,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927a89e8-087c-4503-aafd-50e4a4b621a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:33,774 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash 77337717, now seen corresponding path program 1 times [2022-11-03 02:16:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79447349] [2022-11-03 02:16:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:33,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:16:34,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79447349] [2022-11-03 02:16:34,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79447349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:34,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:34,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:16:34,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014109395] [2022-11-03 02:16:34,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:34,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:16:34,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:16:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:34,550 INFO L87 Difference]: Start difference. First operand 47945 states and 74444 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) [2022-11-03 02:16:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:40,916 INFO L93 Difference]: Finished difference Result 128493 states and 201374 transitions. [2022-11-03 02:16:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:16:40,916 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 129 [2022-11-03 02:16:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:41,474 INFO L225 Difference]: With dead ends: 128493 [2022-11-03 02:16:41,475 INFO L226 Difference]: Without dead ends: 80555 [2022-11-03 02:16:41,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:16:41,944 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 831 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:41,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 856 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:16:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80555 states. [2022-11-03 02:16:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80555 to 71273. [2022-11-03 02:16:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71273 states, 60116 states have (on average 1.4873245059551534) internal successors, (89412), 60405 states have internal predecessors, (89412), 8276 states have call successors, (8276), 2880 states have call predecessors, (8276), 2880 states have return successors, (12628), 7988 states have call predecessors, (12628), 8276 states have call successors, (12628) [2022-11-03 02:16:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71273 states to 71273 states and 110316 transitions. [2022-11-03 02:16:48,337 INFO L78 Accepts]: Start accepts. Automaton has 71273 states and 110316 transitions. Word has length 129 [2022-11-03 02:16:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:48,338 INFO L495 AbstractCegarLoop]: Abstraction has 71273 states and 110316 transitions. [2022-11-03 02:16:48,339 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) [2022-11-03 02:16:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 71273 states and 110316 transitions. [2022-11-03 02:16:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:16:48,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:48,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:16:48,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash -610597555, now seen corresponding path program 1 times [2022-11-03 02:16:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:48,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021541429] [2022-11-03 02:16:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:16:49,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021541429] [2022-11-03 02:16:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021541429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:49,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:49,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:16:49,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554584341] [2022-11-03 02:16:49,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:16:49,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:49,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:16:49,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:49,067 INFO L87 Difference]: Start difference. First operand 71273 states and 110316 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)