./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06a966cd103a9c61c8e9ebcc5255a2d5a7d1dd56b172674853cec63a372f0a43 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:05:27,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:05:27,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:05:27,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:05:27,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:05:27,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:05:27,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:05:27,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:05:27,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:05:27,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:05:27,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:05:27,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:05:27,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:05:27,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:05:27,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:05:27,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:05:27,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:05:27,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:05:27,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:05:27,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:05:27,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:05:28,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:05:28,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:05:28,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:05:28,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:05:28,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:05:28,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:05:28,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:05:28,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:05:28,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:05:28,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:05:28,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:05:28,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:05:28,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:05:28,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:05:28,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:05:28,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:05:28,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:05:28,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:05:28,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:05:28,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:05:28,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:05:28,035 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:05:28,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:05:28,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:05:28,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:05:28,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:05:28,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:05:28,044 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:05:28,045 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:05:28,045 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:05:28,045 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:05:28,045 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:05:28,045 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:05:28,045 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:05:28,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:05:28,046 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:05:28,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:05:28,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:05:28,046 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:05:28,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:05:28,047 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:05:28,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:05:28,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:05:28,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:05:28,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:05:28,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:05:28,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:05:28,048 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:05:28,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:05:28,048 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:05:28,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:05:28,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:05:28,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:05:28,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:05:28,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:05:28,049 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:05:28,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:05:28,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:05:28,050 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:05:28,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:05:28,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:05:28,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:05:28,050 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_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06a966cd103a9c61c8e9ebcc5255a2d5a7d1dd56b172674853cec63a372f0a43 [2022-12-14 13:05:28,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:05:28,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:05:28,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:05:28,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:05:28,229 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:05:28,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c [2022-12-14 13:05:30,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:05:31,179 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:05:31,179 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c [2022-12-14 13:05:31,211 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/data/f634c04d6/ddea38bdc6aa47c4998ff842d7072ba6/FLAG81c594f2a [2022-12-14 13:05:31,347 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/data/f634c04d6/ddea38bdc6aa47c4998ff842d7072ba6 [2022-12-14 13:05:31,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:05:31,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:05:31,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:05:31,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:05:31,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:05:31,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43405e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31, skipping insertion in model container [2022-12-14 13:05:31,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:05:31,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:05:32,942 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c[375709,375722] [2022-12-14 13:05:32,968 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c[383339,383352] [2022-12-14 13:05:33,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:05:33,165 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:05:33,927 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c[375709,375722] [2022-12-14 13:05:33,936 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/sv-benchmarks/c/combinations/Problem05_label48+token_ring.08.cil-1.c[383339,383352] [2022-12-14 13:05:33,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:05:33,989 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:05:33,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33 WrapperNode [2022-12-14 13:05:33,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:05:33,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:05:33,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:05:33,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:05:33,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,273 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-12-14 13:05:34,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:05:34,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:05:34,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:05:34,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:05:34,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:05:34,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:05:34,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:05:34,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:05:34,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (1/1) ... [2022-12-14 13:05:34,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:05:34,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:34,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:05:34,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:05:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:05:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:05:34,700 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:05:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:05:34,700 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:05:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:05:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:05:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:05:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:05:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:05:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:05:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:05:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:05:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:05:34,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:05:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:05:34,820 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:05:34,822 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:05:40,445 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:05:41,692 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:05:41,692 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 13:05:41,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:05:41 BoogieIcfgContainer [2022-12-14 13:05:41,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:05:41,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:05:41,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:05:41,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:05:41,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:05:31" (1/3) ... [2022-12-14 13:05:41,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238bac5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:05:41, skipping insertion in model container [2022-12-14 13:05:41,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:33" (2/3) ... [2022-12-14 13:05:41,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238bac5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:05:41, skipping insertion in model container [2022-12-14 13:05:41,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:05:41" (3/3) ... [2022-12-14 13:05:41,702 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.08.cil-1.c [2022-12-14 13:05:41,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:05:41,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 13:05:41,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:05:41,779 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;@1d6f1a2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:05:41,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 13:05:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 13:05:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 13:05:41,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:41,796 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] [2022-12-14 13:05:41,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1037255050, now seen corresponding path program 1 times [2022-12-14 13:05:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028155929] [2022-12-14 13:05:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:05:42,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028155929] [2022-12-14 13:05:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028155929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:42,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:42,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:05:42,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089366051] [2022-12-14 13:05:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:42,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:05:42,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:05:42,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:42,108 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:05:42,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:42,833 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-12-14 13:05:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:05:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 55 [2022-12-14 13:05:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:42,851 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 13:05:42,851 INFO L226 Difference]: Without dead ends: 1913 [2022-12-14 13:05:42,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:42,859 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:42,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:05:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-12-14 13:05:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-12-14 13:05:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 13:05:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-12-14 13:05:42,946 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-12-14 13:05:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:42,947 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-12-14 13:05:42,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:05:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-12-14 13:05:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:05:42,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:42,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:42,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:05:42,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1952711661, now seen corresponding path program 1 times [2022-12-14 13:05:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745446476] [2022-12-14 13:05:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:05:43,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745446476] [2022-12-14 13:05:43,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745446476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966318154] [2022-12-14 13:05:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:43,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:43,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:43,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:05:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:05:43,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:43,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966318154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:43,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:43,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:05:43,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757163667] [2022-12-14 13:05:43,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:43,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:43,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:43,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:43,362 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:43,800 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-12-14 13:05:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 108 [2022-12-14 13:05:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:43,813 INFO L225 Difference]: With dead ends: 2437 [2022-12-14 13:05:43,814 INFO L226 Difference]: Without dead ends: 2171 [2022-12-14 13:05:43,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:43,817 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:43,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-12-14 13:05:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-12-14 13:05:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 13:05:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-12-14 13:05:43,908 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-12-14 13:05:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:43,908 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-12-14 13:05:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-12-14 13:05:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:05:43,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:43,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:43,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:05:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:44,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1093142925, now seen corresponding path program 1 times [2022-12-14 13:05:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34529936] [2022-12-14 13:05:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:05:44,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34529936] [2022-12-14 13:05:44,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34529936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841539049] [2022-12-14 13:05:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:44,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:44,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:05:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:05:44,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841539049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:44,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:44,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:05:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720456513] [2022-12-14 13:05:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:44,482 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:44,869 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-12-14 13:05:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 108 [2022-12-14 13:05:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:44,882 INFO L225 Difference]: With dead ends: 3196 [2022-12-14 13:05:44,882 INFO L226 Difference]: Without dead ends: 2675 [2022-12-14 13:05:44,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:44,887 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3453 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:44,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3439 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-12-14 13:05:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-12-14 13:05:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 13:05:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-12-14 13:05:44,981 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-12-14 13:05:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:44,982 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-12-14 13:05:44,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-12-14 13:05:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:05:44,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:44,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:44,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:05:45,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:45,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash -101099731, now seen corresponding path program 1 times [2022-12-14 13:05:45,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:45,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176440527] [2022-12-14 13:05:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:45,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:05:45,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176440527] [2022-12-14 13:05:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176440527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:45,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316122010] [2022-12-14 13:05:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:45,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:45,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:05:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:45,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:05:45,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:45,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316122010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:45,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:45,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:05:45,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515224367] [2022-12-14 13:05:45,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:45,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:45,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:45,451 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:45,870 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-12-14 13:05:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 108 [2022-12-14 13:05:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:45,917 INFO L225 Difference]: With dead ends: 4690 [2022-12-14 13:05:45,917 INFO L226 Difference]: Without dead ends: 3667 [2022-12-14 13:05:45,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:45,920 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3456 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:45,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-12-14 13:05:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-12-14 13:05:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-12-14 13:05:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-12-14 13:05:46,000 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-12-14 13:05:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:46,001 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-12-14 13:05:46,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-12-14 13:05:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:05:46,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:46,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:46,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:05:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 13:05:46,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1725015437, now seen corresponding path program 1 times [2022-12-14 13:05:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627302282] [2022-12-14 13:05:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:05:46,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627302282] [2022-12-14 13:05:46,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627302282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501987218] [2022-12-14 13:05:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:46,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:46,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:46,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:05:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:46,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:05:46,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:46,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501987218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:46,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:46,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:05:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168815874] [2022-12-14 13:05:46,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:46,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:46,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:46,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:46,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:46,462 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 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) [2022-12-14 13:05:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:46,840 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-12-14 13:05:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:46,841 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 108 [2022-12-14 13:05:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:46,864 INFO L225 Difference]: With dead ends: 7630 [2022-12-14 13:05:46,865 INFO L226 Difference]: Without dead ends: 5619 [2022-12-14 13:05:46,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:46,874 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:46,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-12-14 13:05:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-12-14 13:05:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-12-14 13:05:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-12-14 13:05:47,019 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-12-14 13:05:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:47,020 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-12-14 13:05:47,020 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) [2022-12-14 13:05:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-12-14 13:05:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:05:47,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:47,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:47,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:05:47,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:47,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 32662317, now seen corresponding path program 1 times [2022-12-14 13:05:47,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8981154] [2022-12-14 13:05:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 13:05:47,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:47,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8981154] [2022-12-14 13:05:47,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8981154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:47,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:47,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:05:47,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078681277] [2022-12-14 13:05:47,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:47,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:47,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:47,348 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:05:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:47,786 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-12-14 13:05:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:47,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-12-14 13:05:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:47,813 INFO L225 Difference]: With dead ends: 8675 [2022-12-14 13:05:47,813 INFO L226 Difference]: Without dead ends: 6657 [2022-12-14 13:05:47,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:47,820 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:47,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-12-14 13:05:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-12-14 13:05:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-12-14 13:05:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-12-14 13:05:47,976 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-12-14 13:05:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:47,976 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-12-14 13:05:47,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:05:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-12-14 13:05:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:05:47,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:47,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:47,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:05:47,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:47,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2080829185, now seen corresponding path program 1 times [2022-12-14 13:05:47,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:47,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883966015] [2022-12-14 13:05:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 13:05:48,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883966015] [2022-12-14 13:05:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883966015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:48,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:48,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:05:48,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010968162] [2022-12-14 13:05:48,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:48,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:48,056 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:48,632 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-12-14 13:05:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 13:05:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:48,656 INFO L225 Difference]: With dead ends: 15526 [2022-12-14 13:05:48,656 INFO L226 Difference]: Without dead ends: 10851 [2022-12-14 13:05:48,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:48,666 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:48,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-12-14 13:05:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-12-14 13:05:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-12-14 13:05:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-12-14 13:05:48,972 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-12-14 13:05:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:48,972 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-12-14 13:05:48,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-12-14 13:05:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:05:48,994 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:48,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:05:48,995 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1641264451, now seen corresponding path program 1 times [2022-12-14 13:05:48,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:48,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469152966] [2022-12-14 13:05:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 13:05:49,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469152966] [2022-12-14 13:05:49,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469152966] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:49,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:49,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:05:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009644627] [2022-12-14 13:05:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:49,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:49,072 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:49,864 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-12-14 13:05:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:49,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 13:05:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:49,922 INFO L225 Difference]: With dead ends: 28822 [2022-12-14 13:05:49,922 INFO L226 Difference]: Without dead ends: 19667 [2022-12-14 13:05:49,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:49,943 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:49,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-12-14 13:05:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-12-14 13:05:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-12-14 13:05:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-12-14 13:05:50,470 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-12-14 13:05:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:50,470 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-12-14 13:05:50,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-12-14 13:05:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:05:50,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:50,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:50,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:05:50,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash -479445243, now seen corresponding path program 1 times [2022-12-14 13:05:50,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:50,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211662825] [2022-12-14 13:05:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:50,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 13:05:50,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:50,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211662825] [2022-12-14 13:05:50,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211662825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:50,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:50,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:05:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860425688] [2022-12-14 13:05:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:50,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:50,554 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:51,800 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-12-14 13:05:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:51,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 13:05:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:51,898 INFO L225 Difference]: With dead ends: 54838 [2022-12-14 13:05:51,898 INFO L226 Difference]: Without dead ends: 36915 [2022-12-14 13:05:51,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:51,936 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:51,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-12-14 13:05:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-12-14 13:05:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-12-14 13:05:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-12-14 13:05:52,908 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-12-14 13:05:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:52,909 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-12-14 13:05:52,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-12-14 13:05:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:05:52,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:52,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:52,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:05:52,954 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1882910616, now seen corresponding path program 1 times [2022-12-14 13:05:52,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:52,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695690264] [2022-12-14 13:05:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 13:05:53,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695690264] [2022-12-14 13:05:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695690264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:53,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:05:53,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051312326] [2022-12-14 13:05:53,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:53,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:53,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:53,011 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:55,015 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-12-14 13:05:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 13:05:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:55,175 INFO L225 Difference]: With dead ends: 105718 [2022-12-14 13:05:55,175 INFO L226 Difference]: Without dead ends: 70643 [2022-12-14 13:05:55,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:05:55,240 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:55,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-12-14 13:05:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-12-14 13:05:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 13:05:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-12-14 13:05:57,512 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-12-14 13:05:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:57,512 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-12-14 13:05:57,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-12-14 13:05:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 13:05:57,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:57,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:57,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:05:57,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash -919218683, now seen corresponding path program 1 times [2022-12-14 13:05:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070447339] [2022-12-14 13:05:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:05:58,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070447339] [2022-12-14 13:05:58,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070447339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297869975] [2022-12-14 13:05:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:58,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:58,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:05:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 13:05:58,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:58,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297869975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:58,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:58,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:05:58,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99007194] [2022-12-14 13:05:58,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:58,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:58,358 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:00,773 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-12-14 13:06:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 13:06:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:01,002 INFO L225 Difference]: With dead ends: 133109 [2022-12-14 13:06:01,002 INFO L226 Difference]: Without dead ends: 98035 [2022-12-14 13:06:01,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:01,071 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:01,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:06:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-12-14 13:06:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-12-14 13:06:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 13:06:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-12-14 13:06:04,571 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-12-14 13:06:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:04,571 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-12-14 13:06:04,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-12-14 13:06:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 13:06:04,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:04,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:04,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:06:04,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:04,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 255574233, now seen corresponding path program 2 times [2022-12-14 13:06:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:04,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368420081] [2022-12-14 13:06:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:04,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:06:05,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:05,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368420081] [2022-12-14 13:06:05,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368420081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:05,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961871022] [2022-12-14 13:06:05,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:06:05,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:05,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:05,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:05,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:06:05,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:06:05,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:06:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:06:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:06:05,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:05,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961871022] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:05,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:05,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:06:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907575082] [2022-12-14 13:06:05,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:05,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:05,377 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:06:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:07,829 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-12-14 13:06:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:07,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 13:06:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:08,163 INFO L225 Difference]: With dead ends: 135285 [2022-12-14 13:06:08,163 INFO L226 Difference]: Without dead ends: 85363 [2022-12-14 13:06:08,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:08,214 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:08,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:06:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states. [2022-12-14 13:06:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85363 to 84849. [2022-12-14 13:06:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84849 states, 73323 states have (on average 1.5075078761098155) internal successors, (110535), 73581 states have internal predecessors, (110535), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 13:06:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84849 states to 84849 states and 126159 transitions. [2022-12-14 13:06:10,737 INFO L78 Accepts]: Start accepts. Automaton has 84849 states and 126159 transitions. Word has length 167 [2022-12-14 13:06:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:10,737 INFO L495 AbstractCegarLoop]: Abstraction has 84849 states and 126159 transitions. [2022-12-14 13:06:10,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:06:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 84849 states and 126159 transitions. [2022-12-14 13:06:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 13:06:10,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:10,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:10,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:06:11,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:11,070 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash 772215003, now seen corresponding path program 1 times [2022-12-14 13:06:11,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894304631] [2022-12-14 13:06:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:11,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:06:11,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894304631] [2022-12-14 13:06:11,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894304631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:11,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195876198] [2022-12-14 13:06:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:11,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:11,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:11,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:06:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:11,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:06:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:06:11,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:11,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195876198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:11,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:11,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:06:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025005564] [2022-12-14 13:06:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:11,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:11,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:11,482 INFO L87 Difference]: Start difference. First operand 84849 states and 126159 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:15,009 INFO L93 Difference]: Finished difference Result 127669 states and 191953 transitions. [2022-12-14 13:06:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 13:06:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:15,202 INFO L225 Difference]: With dead ends: 127669 [2022-12-14 13:06:15,202 INFO L226 Difference]: Without dead ends: 85107 [2022-12-14 13:06:15,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:15,291 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 172 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6595 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:15,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 6595 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:06:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85107 states. [2022-12-14 13:06:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85107 to 84209. [2022-12-14 13:06:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84209 states, 72683 states have (on average 1.4926048732165706) internal successors, (108487), 72941 states have internal predecessors, (108487), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 13:06:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84209 states to 84209 states and 124111 transitions. [2022-12-14 13:06:18,068 INFO L78 Accepts]: Start accepts. Automaton has 84209 states and 124111 transitions. Word has length 167 [2022-12-14 13:06:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:18,068 INFO L495 AbstractCegarLoop]: Abstraction has 84209 states and 124111 transitions. [2022-12-14 13:06:18,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 84209 states and 124111 transitions. [2022-12-14 13:06:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 13:06:18,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:18,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:18,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:06:18,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:18,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1552337383, now seen corresponding path program 1 times [2022-12-14 13:06:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11467614] [2022-12-14 13:06:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:06:18,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11467614] [2022-12-14 13:06:18,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11467614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391448756] [2022-12-14 13:06:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:18,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:18,589 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:18,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:06:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:06:18,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 13:06:18,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:18,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391448756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:18,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:18,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:06:18,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670391643] [2022-12-14 13:06:18,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:18,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:18,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:18,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:18,767 INFO L87 Difference]: Start difference. First operand 84209 states and 124111 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:06:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:21,655 INFO L93 Difference]: Finished difference Result 144493 states and 209034 transitions. [2022-12-14 13:06:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 13:06:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:21,886 INFO L225 Difference]: With dead ends: 144493 [2022-12-14 13:06:21,886 INFO L226 Difference]: Without dead ends: 102891 [2022-12-14 13:06:21,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:21,975 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3451 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:21,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3305 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:06:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2022-12-14 13:06:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2022-12-14 13:06:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 89833 states have (on average 1.4384580276735721) internal successors, (129221), 90091 states have internal predecessors, (129221), 8322 states have call successors, (8322), 4734 states have call predecessors, (8322), 4734 states have return successors, (8322), 8066 states have call predecessors, (8322), 8322 states have call successors, (8322) [2022-12-14 13:06:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 145865 transitions. [2022-12-14 13:06:25,221 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 145865 transitions. Word has length 167 [2022-12-14 13:06:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:25,222 INFO L495 AbstractCegarLoop]: Abstraction has 102891 states and 145865 transitions. [2022-12-14 13:06:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:06:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 145865 transitions. [2022-12-14 13:06:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 13:06:25,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:25,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:25,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:25,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:06:25,760 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 243753646, now seen corresponding path program 1 times [2022-12-14 13:06:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450735519] [2022-12-14 13:06:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:06:26,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450735519] [2022-12-14 13:06:26,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450735519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278364331] [2022-12-14 13:06:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:26,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:26,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:26,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:06:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:06:26,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:06:26,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:26,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278364331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:26,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:26,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 13:06:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187542291] [2022-12-14 13:06:26,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:26,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:06:26,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:06:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:06:26,251 INFO L87 Difference]: Start difference. First operand 102891 states and 145865 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:06:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:32,337 INFO L93 Difference]: Finished difference Result 309085 states and 435513 transitions. [2022-12-14 13:06:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:06:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 168 [2022-12-14 13:06:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:32,866 INFO L225 Difference]: With dead ends: 309085 [2022-12-14 13:06:32,866 INFO L226 Difference]: Without dead ends: 207841 [2022-12-14 13:06:33,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:06:33,016 INFO L413 NwaCegarLoop]: 3427 mSDtfsCounter, 3477 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 6985 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:33,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 6985 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:06:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207841 states. [2022-12-14 13:06:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207841 to 207583. [2022-12-14 13:06:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207583 states, 181477 states have (on average 1.4215851044484975) internal successors, (257985), 182247 states have internal predecessors, (257985), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9722 states have return successors, (17150), 15870 states have call predecessors, (17150), 16382 states have call successors, (17150) [2022-12-14 13:06:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207583 states to 207583 states and 291517 transitions. [2022-12-14 13:06:40,121 INFO L78 Accepts]: Start accepts. Automaton has 207583 states and 291517 transitions. Word has length 168 [2022-12-14 13:06:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:40,121 INFO L495 AbstractCegarLoop]: Abstraction has 207583 states and 291517 transitions. [2022-12-14 13:06:40,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:06:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 207583 states and 291517 transitions. [2022-12-14 13:06:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 13:06:40,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:40,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:40,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:40,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:06:40,734 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1594468515, now seen corresponding path program 1 times [2022-12-14 13:06:40,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606778664] [2022-12-14 13:06:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:06:40,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606778664] [2022-12-14 13:06:40,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606778664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032435030] [2022-12-14 13:06:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:40,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:40,948 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:06:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:06:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:06:41,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:41,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032435030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:41,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:41,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:06:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727721493] [2022-12-14 13:06:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:41,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:41,096 INFO L87 Difference]: Start difference. First operand 207583 states and 291517 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:06:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:50,823 INFO L93 Difference]: Finished difference Result 491081 states and 701088 transitions. [2022-12-14 13:06:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 13:06:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:51,747 INFO L225 Difference]: With dead ends: 491081 [2022-12-14 13:06:51,747 INFO L226 Difference]: Without dead ends: 285145 [2022-12-14 13:06:52,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:52,006 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 93 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:52,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6486 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:06:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285145 states. [2022-12-14 13:07:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285145 to 236267. [2022-12-14 13:07:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236267 states, 208619 states have (on average 1.4526337486039143) internal successors, (303047), 209391 states have internal predecessors, (303047), 17153 states have call successors, (17153), 10237 states have call predecessors, (17153), 10493 states have return successors, (17921), 16639 states have call predecessors, (17921), 17153 states have call successors, (17921) [2022-12-14 13:07:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236267 states to 236267 states and 338121 transitions. [2022-12-14 13:07:01,174 INFO L78 Accepts]: Start accepts. Automaton has 236267 states and 338121 transitions. Word has length 168 [2022-12-14 13:07:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:07:01,175 INFO L495 AbstractCegarLoop]: Abstraction has 236267 states and 338121 transitions. [2022-12-14 13:07:01,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:07:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 236267 states and 338121 transitions. [2022-12-14 13:07:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 13:07:01,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:07:01,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:07:01,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:07:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:07:01,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:07:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:07:01,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1417292662, now seen corresponding path program 1 times [2022-12-14 13:07:01,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:07:01,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100033127] [2022-12-14 13:07:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:01,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:07:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 13:07:01,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:07:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100033127] [2022-12-14 13:07:01,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100033127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:07:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412435868] [2022-12-14 13:07:01,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:01,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:07:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:07:01,912 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:07:01,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:07:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:07:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:07:02,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:07:02,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412435868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:07:02,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:07:02,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 13:07:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363393976] [2022-12-14 13:07:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:07:02,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:07:02,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:07:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:07:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:07:02,163 INFO L87 Difference]: Start difference. First operand 236267 states and 338121 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:15,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:07:15,438 INFO L93 Difference]: Finished difference Result 583639 states and 833651 transitions. [2022-12-14 13:07:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:07:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 169 [2022-12-14 13:07:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:07:16,525 INFO L225 Difference]: With dead ends: 583639 [2022-12-14 13:07:16,525 INFO L226 Difference]: Without dead ends: 349019 [2022-12-14 13:07:16,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:07:16,870 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 7220 mSDsluCounter, 6352 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7237 SdHoareTripleChecker+Valid, 9579 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:07:16,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7237 Valid, 9579 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:07:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349019 states. [2022-12-14 13:07:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349019 to 349017. [2022-12-14 13:07:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349017 states, 307813 states have (on average 1.4412939024667575) internal successors, (443649), 308969 states have internal predecessors, (443649), 25467 states have call successors, (25467), 15351 states have call predecessors, (25467), 15735 states have return successors, (26619), 24697 states have call predecessors, (26619), 25467 states have call successors, (26619) [2022-12-14 13:07:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349017 states to 349017 states and 495735 transitions. [2022-12-14 13:07:30,998 INFO L78 Accepts]: Start accepts. Automaton has 349017 states and 495735 transitions. Word has length 169 [2022-12-14 13:07:30,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:07:30,998 INFO L495 AbstractCegarLoop]: Abstraction has 349017 states and 495735 transitions. [2022-12-14 13:07:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 349017 states and 495735 transitions. [2022-12-14 13:07:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 13:07:31,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:07:31,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:07:31,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 13:07:31,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:07:31,907 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:07:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:07:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -792322466, now seen corresponding path program 1 times [2022-12-14 13:07:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:07:31,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016168795] [2022-12-14 13:07:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:07:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:07:32,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:07:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016168795] [2022-12-14 13:07:32,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016168795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:07:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446561521] [2022-12-14 13:07:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:32,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:07:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:07:32,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:07:32,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:07:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:32,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:07:32,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:07:32,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:07:32,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446561521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:07:32,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:07:32,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 13:07:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337694075] [2022-12-14 13:07:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:07:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:07:32,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:07:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:07:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:07:32,432 INFO L87 Difference]: Start difference. First operand 349017 states and 495735 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:07:54,370 INFO L93 Difference]: Finished difference Result 862081 states and 1222013 transitions. [2022-12-14 13:07:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:07:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 171 [2022-12-14 13:07:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:07:55,895 INFO L225 Difference]: With dead ends: 862081 [2022-12-14 13:07:55,895 INFO L226 Difference]: Without dead ends: 514711 [2022-12-14 13:07:56,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:07:56,351 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3836 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 9654 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:07:56,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 9654 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:07:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514711 states. [2022-12-14 13:08:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514711 to 514709. [2022-12-14 13:08:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514709 states, 453305 states have (on average 1.428629730534629) internal successors, (647605), 455037 states have internal predecessors, (647605), 37807 states have call successors, (37807), 23019 states have call predecessors, (37807), 23595 states have return successors, (39535), 36653 states have call predecessors, (39535), 37807 states have call successors, (39535) [2022-12-14 13:08:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514709 states to 514709 states and 724947 transitions. [2022-12-14 13:08:20,894 INFO L78 Accepts]: Start accepts. Automaton has 514709 states and 724947 transitions. Word has length 171 [2022-12-14 13:08:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:20,894 INFO L495 AbstractCegarLoop]: Abstraction has 514709 states and 724947 transitions. [2022-12-14 13:08:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:08:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 514709 states and 724947 transitions. [2022-12-14 13:08:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 13:08:21,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:21,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:21,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:08:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:08:22,071 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1140852406, now seen corresponding path program 1 times [2022-12-14 13:08:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338587432] [2022-12-14 13:08:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:22,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338587432] [2022-12-14 13:08:22,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338587432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097452342] [2022-12-14 13:08:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:22,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:22,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:08:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:08:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 13:08:22,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:22,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097452342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:22,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:22,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 13:08:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115128956] [2022-12-14 13:08:22,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:22,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:08:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:22,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:08:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:08:22,439 INFO L87 Difference]: Start difference. First operand 514709 states and 724947 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:08:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:44,343 INFO L93 Difference]: Finished difference Result 923824 states and 1295254 transitions. [2022-12-14 13:08:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:08:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 173 [2022-12-14 13:08:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:45,684 INFO L225 Difference]: With dead ends: 923824 [2022-12-14 13:08:45,684 INFO L226 Difference]: Without dead ends: 410762 [2022-12-14 13:08:46,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:08:46,292 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3814 mSDsluCounter, 6461 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:46,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3831 Valid, 9703 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:08:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410762 states. [2022-12-14 13:09:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410762 to 394398. [2022-12-14 13:09:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394398 states, 347465 states have (on average 1.4243707999366844) internal successors, (494919), 348908 states have internal predecessors, (494919), 28509 states have call successors, (28509), 17270 states have call predecessors, (28509), 18422 states have return successors, (29661), 28220 states have call predecessors, (29661), 28509 states have call successors, (29661) [2022-12-14 13:09:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394398 states to 394398 states and 553089 transitions. [2022-12-14 13:09:07,988 INFO L78 Accepts]: Start accepts. Automaton has 394398 states and 553089 transitions. Word has length 173 [2022-12-14 13:09:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:07,988 INFO L495 AbstractCegarLoop]: Abstraction has 394398 states and 553089 transitions. [2022-12-14 13:09:07,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:09:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 394398 states and 553089 transitions. [2022-12-14 13:09:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 13:09:08,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:08,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:08,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:09:08,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:08,996 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1049601534, now seen corresponding path program 2 times [2022-12-14 13:09:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:08,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077862640] [2022-12-14 13:09:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:09:09,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:09,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077862640] [2022-12-14 13:09:09,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077862640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:09,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019380019] [2022-12-14 13:09:09,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:09:09,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:09,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:09,174 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:09,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:09:09,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:09:09,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:09:09,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:09:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 13:09:09,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:09,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019380019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:09,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:09,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:09:09,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101222260] [2022-12-14 13:09:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:09,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:09:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:09:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:09:09,340 INFO L87 Difference]: Start difference. First operand 394398 states and 553089 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:09:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:27,316 INFO L93 Difference]: Finished difference Result 528260 states and 742294 transitions. [2022-12-14 13:09:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:09:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 174 [2022-12-14 13:09:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:28,335 INFO L225 Difference]: With dead ends: 528260 [2022-12-14 13:09:28,335 INFO L226 Difference]: Without dead ends: 376062 [2022-12-14 13:09:28,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:09:28,575 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 52 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:28,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6479 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:09:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376062 states. [2022-12-14 13:09:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376062 to 352830. [2022-12-14 13:09:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352830 states, 309353 states have (on average 1.4443790750372552) internal successors, (446823), 309932 states have internal predecessors, (446823), 27357 states have call successors, (27357), 16118 states have call predecessors, (27357), 16118 states have return successors, (27357), 26780 states have call predecessors, (27357), 27357 states have call successors, (27357) [2022-12-14 13:09:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352830 states to 352830 states and 501537 transitions. [2022-12-14 13:09:48,715 INFO L78 Accepts]: Start accepts. Automaton has 352830 states and 501537 transitions. Word has length 174 [2022-12-14 13:09:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:48,715 INFO L495 AbstractCegarLoop]: Abstraction has 352830 states and 501537 transitions. [2022-12-14 13:09:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:09:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 352830 states and 501537 transitions. [2022-12-14 13:09:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 13:09:49,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:49,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:49,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:09:49,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:49,491 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:49,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1468271235, now seen corresponding path program 1 times [2022-12-14 13:09:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:49,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672114732] [2022-12-14 13:09:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:49,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:09:49,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672114732] [2022-12-14 13:09:49,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672114732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454973270] [2022-12-14 13:09:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:49,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:49,675 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:49,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:09:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:09:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:09:49,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:49,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454973270] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:49,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:49,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 13:09:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92160862] [2022-12-14 13:09:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:09:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:09:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:09:49,897 INFO L87 Difference]: Start difference. First operand 352830 states and 501537 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:10:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:10:18,553 INFO L93 Difference]: Finished difference Result 870278 states and 1234119 transitions. [2022-12-14 13:10:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:10:18,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 13:10:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:10:20,075 INFO L225 Difference]: With dead ends: 870278 [2022-12-14 13:10:20,075 INFO L226 Difference]: Without dead ends: 519152 [2022-12-14 13:10:20,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:10:20,520 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 7201 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7218 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:10:20,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7218 Valid, 9571 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:10:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519152 states. [2022-12-14 13:10:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519152 to 519150. [2022-12-14 13:10:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519150 states, 454393 states have (on average 1.4295092574049335) internal successors, (649559), 455260 states have internal predecessors, (649559), 40589 states have call successors, (40589), 24166 states have call predecessors, (40589), 24166 states have return successors, (40589), 39724 states have call predecessors, (40589), 40589 states have call successors, (40589) [2022-12-14 13:10:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519150 states to 519150 states and 730737 transitions. [2022-12-14 13:10:50,213 INFO L78 Accepts]: Start accepts. Automaton has 519150 states and 730737 transitions. Word has length 174 [2022-12-14 13:10:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:10:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 519150 states and 730737 transitions. [2022-12-14 13:10:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:10:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 519150 states and 730737 transitions. [2022-12-14 13:10:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 13:10:51,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:10:51,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:10:51,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:10:51,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:10:51,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:10:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:10:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1154787053, now seen corresponding path program 1 times [2022-12-14 13:10:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:10:51,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217570680] [2022-12-14 13:10:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:10:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:10:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:10:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 13:10:51,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:10:51,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217570680] [2022-12-14 13:10:51,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217570680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:10:51,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240731728] [2022-12-14 13:10:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:10:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:10:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:10:51,674 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:10:51,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:10:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:10:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:10:51,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:10:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 13:10:51,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:10:51,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240731728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:10:51,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:10:51,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:10:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500375937] [2022-12-14 13:10:51,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:10:51,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:10:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:10:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:10:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:10:51,850 INFO L87 Difference]: Start difference. First operand 519150 states and 730737 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:11:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:11:26,434 INFO L93 Difference]: Finished difference Result 1006530 states and 1427043 transitions. [2022-12-14 13:11:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:11:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 172 [2022-12-14 13:11:26,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:11:28,359 INFO L225 Difference]: With dead ends: 1006530 [2022-12-14 13:11:28,359 INFO L226 Difference]: Without dead ends: 661744 [2022-12-14 13:11:28,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:11:28,870 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 130 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 6596 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:11:28,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 6596 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:11:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661744 states. [2022-12-14 13:12:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661744 to 603390. [2022-12-14 13:12:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603390 states, 533449 states have (on average 1.4533179366724842) internal successors, (775271), 534316 states have internal predecessors, (775271), 43181 states have call successors, (43181), 26758 states have call predecessors, (43181), 26758 states have return successors, (43181), 42316 states have call predecessors, (43181), 43181 states have call successors, (43181) [2022-12-14 13:12:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603390 states to 603390 states and 861633 transitions. [2022-12-14 13:12:03,768 INFO L78 Accepts]: Start accepts. Automaton has 603390 states and 861633 transitions. Word has length 172 [2022-12-14 13:12:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:03,769 INFO L495 AbstractCegarLoop]: Abstraction has 603390 states and 861633 transitions. [2022-12-14 13:12:03,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:12:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 603390 states and 861633 transitions. [2022-12-14 13:12:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 13:12:04,738 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:04,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:12:04,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:12:04,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 13:12:04,940 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:12:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1268647786, now seen corresponding path program 1 times [2022-12-14 13:12:04,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:12:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116257764] [2022-12-14 13:12:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:04,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:12:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:12:05,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:12:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116257764] [2022-12-14 13:12:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116257764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860490986] [2022-12-14 13:12:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:05,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:05,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:12:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:12:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 13:12:05,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:12:05,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860490986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:12:05,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:12:05,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 13:12:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487867428] [2022-12-14 13:12:05,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:12:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:12:05,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:12:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:12:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:12:05,481 INFO L87 Difference]: Start difference. First operand 603390 states and 861633 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:12:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:55,075 INFO L93 Difference]: Finished difference Result 1440566 states and 2049303 transitions. [2022-12-14 13:12:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:12:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 13:12:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:57,747 INFO L225 Difference]: With dead ends: 1440566 [2022-12-14 13:12:57,747 INFO L226 Difference]: Without dead ends: 838880 [2022-12-14 13:12:58,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:12:58,721 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 7197 mSDsluCounter, 6332 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7214 SdHoareTripleChecker+Valid, 9564 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:58,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7214 Valid, 9564 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:12:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838880 states. [2022-12-14 13:13:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838880 to 838878. [2022-12-14 13:13:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838878 states, 738113 states have (on average 1.4352152041760544) internal successors, (1059351), 739412 states have internal predecessors, (1059351), 62373 states have call successors, (62373), 38390 states have call predecessors, (62373), 38390 states have return successors, (62373), 61076 states have call predecessors, (62373), 62373 states have call successors, (62373) [2022-12-14 13:13:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838878 states to 838878 states and 1184097 transitions. [2022-12-14 13:13:52,494 INFO L78 Accepts]: Start accepts. Automaton has 838878 states and 1184097 transitions. Word has length 174 [2022-12-14 13:13:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:52,495 INFO L495 AbstractCegarLoop]: Abstraction has 838878 states and 1184097 transitions. [2022-12-14 13:13:52,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:13:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 838878 states and 1184097 transitions. [2022-12-14 13:13:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 13:13:54,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:54,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:54,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:13:54,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:54,317 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 759434533, now seen corresponding path program 1 times [2022-12-14 13:13:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52961571] [2022-12-14 13:13:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:13:54,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52961571] [2022-12-14 13:13:54,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52961571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738433212] [2022-12-14 13:13:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:54,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:54,582 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:54,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f067b95-cfb1-4cf4-b29d-aec1060225c0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:13:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:54,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:13:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 13:13:54,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:13:54,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738433212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:13:54,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:13:54,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 13:13:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835415512] [2022-12-14 13:13:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:13:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:13:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:13:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:13:54,862 INFO L87 Difference]: Start difference. First operand 838878 states and 1184097 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)