./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/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_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/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_3c6c04aa-edb4-445a-adf4-eb4324993743/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 656e7d531f093f57119c43761759c34009a10647aaa5132e17630f3bef948c7c --- 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 13:35:47,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:35:47,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:35:47,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:35:47,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:35:47,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:35:47,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:35:47,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:35:47,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:35:47,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:35:47,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:35:47,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:35:47,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:35:47,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:35:47,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:35:47,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:35:47,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:35:47,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:35:47,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:35:47,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:35:47,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:35:47,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:35:47,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:35:47,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:35:47,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:35:47,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:35:47,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:35:47,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:35:47,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:35:47,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:35:47,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:35:47,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:35:47,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:35:47,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:35:47,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:35:47,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:35:47,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:35:47,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:35:47,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:35:47,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:35:47,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:35:47,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:35:47,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:35:47,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:35:47,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:35:47,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:35:47,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:35:47,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:35:47,326 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:35:47,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:35:47,326 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:35:47,327 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:35:47,327 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:35:47,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:35:47,327 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:35:47,327 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:35:47,328 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:35:47,328 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:35:47,328 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:35:47,328 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:35:47,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:35:47,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:35:47,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:35:47,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:35:47,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:35:47,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:35:47,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:35:47,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:35:47,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:35:47,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:35:47,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:35:47,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:35:47,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:35:47,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:35:47,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:35:47,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:35:47,332 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:35:47,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:35:47,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:35:47,333 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:35:47,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:35:47,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:35:47,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:35:47,334 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_3c6c04aa-edb4-445a-adf4-eb4324993743/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 656e7d531f093f57119c43761759c34009a10647aaa5132e17630f3bef948c7c [2022-12-14 13:35:47,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:35:47,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:35:47,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:35:47,542 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:35:47,543 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:35:47,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c [2022-12-14 13:35:50,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:35:50,481 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:35:50,482 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c [2022-12-14 13:35:50,512 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/data/6fb24b465/0fe9498f750343e0bc2e9e1a4bbbebad/FLAGbdaf300de [2022-12-14 13:35:50,526 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/data/6fb24b465/0fe9498f750343e0bc2e9e1a4bbbebad [2022-12-14 13:35:50,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:35:50,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:35:50,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:35:50,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:35:50,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:35:50,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:50" (1/1) ... [2022-12-14 13:35:50,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffc526a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:50, skipping insertion in model container [2022-12-14 13:35:50,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:50" (1/1) ... [2022-12-14 13:35:50,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:35:50,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:35:52,079 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_3c6c04aa-edb4-445a-adf4-eb4324993743/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[376251,376264] [2022-12-14 13:35:52,108 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_3c6c04aa-edb4-445a-adf4-eb4324993743/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[383339,383352] [2022-12-14 13:35:52,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:35:52,273 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:35:53,064 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_3c6c04aa-edb4-445a-adf4-eb4324993743/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[376251,376264] [2022-12-14 13:35:53,070 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_3c6c04aa-edb4-445a-adf4-eb4324993743/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[383339,383352] [2022-12-14 13:35:53,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:35:53,112 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:35:53,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53 WrapperNode [2022-12-14 13:35:53,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:35:53,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:35:53,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:35:53,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:35:53,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,384 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2022-12-14 13:35:53,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:35:53,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:35:53,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:35:53,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:35:53,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:35:53,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:35:53,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:35:53,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:35:53,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (1/1) ... [2022-12-14 13:35:53,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:35:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:53,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:35:53,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:35:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:35:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:35:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:35:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:35:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:35:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:35:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:35:53,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:35:53,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:35:53,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:35:53,841 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:35:53,843 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:35:59,549 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:36:00,879 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:36:00,879 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 13:36:00,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:00 BoogieIcfgContainer [2022-12-14 13:36:00,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:36:00,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:36:00,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:36:00,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:36:00,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:35:50" (1/3) ... [2022-12-14 13:36:00,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97c5a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:36:00, skipping insertion in model container [2022-12-14 13:36:00,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:53" (2/3) ... [2022-12-14 13:36:00,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97c5a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:36:00, skipping insertion in model container [2022-12-14 13:36:00,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:00" (3/3) ... [2022-12-14 13:36:00,888 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.05.cil-1.c [2022-12-14 13:36:00,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:36:00,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 13:36:00,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:36:00,975 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;@20c74b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:36:00,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 13:36:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 13:36:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 13:36:00,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:00,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:00,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:00,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1181287613, now seen corresponding path program 1 times [2022-12-14 13:36:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870131780] [2022-12-14 13:36:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:01,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:01,326 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 13:36:01,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:01,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870131780] [2022-12-14 13:36:01,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870131780] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:01,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:36:01,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:36:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013957542] [2022-12-14 13:36:01,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:01,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:36:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:36:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:36:01,362 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:36:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:02,040 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2022-12-14 13:36:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:36:02,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 46 [2022-12-14 13:36:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:02,082 INFO L225 Difference]: With dead ends: 3602 [2022-12-14 13:36:02,082 INFO L226 Difference]: Without dead ends: 1847 [2022-12-14 13:36:02,088 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 13:36:02,091 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:02,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:36:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-12-14 13:36:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2022-12-14 13:36:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 13:36:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2022-12-14 13:36:02,201 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2022-12-14 13:36:02,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:02,202 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2022-12-14 13:36:02,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 13:36:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2022-12-14 13:36:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:36:02,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:02,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:36:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:36:02,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1724624618, now seen corresponding path program 1 times [2022-12-14 13:36:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830985137] [2022-12-14 13:36:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:36:02,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:02,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830985137] [2022-12-14 13:36:02,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830985137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:02,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329583239] [2022-12-14 13:36:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:02,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:02,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:02,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:36:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:36:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:36:02,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:36:02,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329583239] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:02,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:36:02,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:36:02,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085375964] [2022-12-14 13:36:02,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:02,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:02,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:36:02,544 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 13:36:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:02,959 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2022-12-14 13:36:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2022-12-14 13:36:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:02,969 INFO L225 Difference]: With dead ends: 2239 [2022-12-14 13:36:02,969 INFO L226 Difference]: Without dead ends: 2039 [2022-12-14 13:36:02,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 13:36:02,972 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3399 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:02,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:36:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-12-14 13:36:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2022-12-14 13:36:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-12-14 13:36:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2022-12-14 13:36:03,025 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2022-12-14 13:36:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:03,025 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2022-12-14 13:36:03,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 13:36:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2022-12-14 13:36:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:36:03,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:03,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:36:03,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:36:03,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:03,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1358601320, now seen corresponding path program 1 times [2022-12-14 13:36:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:03,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570762788] [2022-12-14 13:36:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:36:03,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570762788] [2022-12-14 13:36:03,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570762788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919000501] [2022-12-14 13:36:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:03,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:03,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:03,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:36:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:03,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:36:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:36:03,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:36:03,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919000501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:03,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:36:03,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:36:03,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949618322] [2022-12-14 13:36:03,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:03,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:36:03,441 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 13:36:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:03,778 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2022-12-14 13:36:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:03,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 87 [2022-12-14 13:36:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:03,790 INFO L225 Difference]: With dead ends: 2800 [2022-12-14 13:36:03,790 INFO L226 Difference]: Without dead ends: 2411 [2022-12-14 13:36:03,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 13:36:03,794 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:03,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:36:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-12-14 13:36:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2022-12-14 13:36:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 13:36:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2022-12-14 13:36:03,861 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2022-12-14 13:36:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:03,861 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2022-12-14 13:36:03,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 13:36:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2022-12-14 13:36:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:36:03,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:03,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:36:03,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:36:04,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:04,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:04,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2080495146, now seen corresponding path program 1 times [2022-12-14 13:36:04,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:04,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146223535] [2022-12-14 13:36:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:04,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:36:04,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146223535] [2022-12-14 13:36:04,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146223535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562333277] [2022-12-14 13:36:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:04,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:04,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:04,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:36:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:04,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:36:04,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:36:04,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:36:04,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562333277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:04,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:36:04,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:36:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937465948] [2022-12-14 13:36:04,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:04,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:04,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:04,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:36:04,307 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 13:36:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:04,641 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2022-12-14 13:36:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:04,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 87 [2022-12-14 13:36:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:04,655 INFO L225 Difference]: With dead ends: 3898 [2022-12-14 13:36:04,655 INFO L226 Difference]: Without dead ends: 3139 [2022-12-14 13:36:04,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 13:36:04,660 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:04,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:36:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-12-14 13:36:04,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2022-12-14 13:36:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-12-14 13:36:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2022-12-14 13:36:04,776 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2022-12-14 13:36:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:04,776 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2022-12-14 13:36:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 13:36:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2022-12-14 13:36:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:36:04,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:04,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:36:04,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:36:04,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:04,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1185400280, now seen corresponding path program 1 times [2022-12-14 13:36:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:04,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718470118] [2022-12-14 13:36:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 13:36:05,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718470118] [2022-12-14 13:36:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718470118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:05,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:36:05,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:36:05,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870029155] [2022-12-14 13:36:05,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:05,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:36:05,046 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 13:36:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:05,479 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2022-12-14 13:36:05,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 87 [2022-12-14 13:36:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:05,494 INFO L225 Difference]: With dead ends: 4283 [2022-12-14 13:36:05,494 INFO L226 Difference]: Without dead ends: 3521 [2022-12-14 13:36:05,498 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 13:36:05,498 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:05,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:36:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-12-14 13:36:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2022-12-14 13:36:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-12-14 13:36:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2022-12-14 13:36:05,617 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2022-12-14 13:36:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:05,617 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2022-12-14 13:36:05,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 13:36:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2022-12-14 13:36:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 13:36:05,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:05,623 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 13:36:05,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:36:05,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1211467313, now seen corresponding path program 1 times [2022-12-14 13:36:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:05,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322292283] [2022-12-14 13:36:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:05,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 13:36:05,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322292283] [2022-12-14 13:36:05,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322292283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:05,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:36:05,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:36:05,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196674303] [2022-12-14 13:36:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:05,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:05,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:36:05,702 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 13:36:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:06,091 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2022-12-14 13:36:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-12-14 13:36:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:06,110 INFO L225 Difference]: With dead ends: 6754 [2022-12-14 13:36:06,110 INFO L226 Difference]: Without dead ends: 5027 [2022-12-14 13:36:06,117 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 13:36:06,118 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:06,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:36:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-12-14 13:36:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2022-12-14 13:36:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-12-14 13:36:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2022-12-14 13:36:06,262 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2022-12-14 13:36:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:06,263 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2022-12-14 13:36:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 13:36:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2022-12-14 13:36:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 13:36:06,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:06,269 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 13:36:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:36:06,270 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1504403105, now seen corresponding path program 1 times [2022-12-14 13:36:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:06,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601751579] [2022-12-14 13:36:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 13:36:06,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601751579] [2022-12-14 13:36:06,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601751579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:06,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:36:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:36:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447198623] [2022-12-14 13:36:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:36:06,320 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 13:36:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:06,867 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2022-12-14 13:36:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-12-14 13:36:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:06,894 INFO L225 Difference]: With dead ends: 11566 [2022-12-14 13:36:06,894 INFO L226 Difference]: Without dead ends: 8211 [2022-12-14 13:36:06,903 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 13:36:06,904 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:06,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:36:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-12-14 13:36:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2022-12-14 13:36:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-12-14 13:36:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2022-12-14 13:36:07,120 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2022-12-14 13:36:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:07,121 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2022-12-14 13:36:07,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 13:36:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2022-12-14 13:36:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 13:36:07,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:07,136 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, 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 13:36:07,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:36:07,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:07,137 INFO L85 PathProgramCache]: Analyzing trace with hash -894432958, now seen corresponding path program 1 times [2022-12-14 13:36:07,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:07,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568637098] [2022-12-14 13:36:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:07,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 13:36:07,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568637098] [2022-12-14 13:36:07,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568637098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795144732] [2022-12-14 13:36:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:07,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:07,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:07,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:07,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:36:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:36:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:36:07,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:36:07,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795144732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:36:07,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:36:07,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:36:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975606158] [2022-12-14 13:36:07,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:36:07,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:36:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:36:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:36:07,388 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 13:36:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:07,931 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2022-12-14 13:36:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:36:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 134 [2022-12-14 13:36:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:07,956 INFO L225 Difference]: With dead ends: 13957 [2022-12-14 13:36:07,957 INFO L226 Difference]: Without dead ends: 10627 [2022-12-14 13:36:07,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:36:07,964 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:07,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:36:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2022-12-14 13:36:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2022-12-14 13:36:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-12-14 13:36:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2022-12-14 13:36:08,314 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2022-12-14 13:36:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:08,314 INFO L495 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2022-12-14 13:36:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 13:36:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2022-12-14 13:36:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 13:36:08,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:08,330 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, 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 13:36:08,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:36:08,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 13:36:08,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:08,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1430324345, now seen corresponding path program 2 times [2022-12-14 13:36:08,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825629009] [2022-12-14 13:36:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:08,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 13:36:08,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:08,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825629009] [2022-12-14 13:36:08,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825629009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:08,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211894486] [2022-12-14 13:36:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:36:08,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:08,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:08,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6c04aa-edb4-445a-adf4-eb4324993743/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:36:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:36:08,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:36:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:36:09,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 13:36:09,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211894486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:09,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691388057] [2022-12-14 13:36:09,346 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 13:36:09,346 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:09,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:09,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:09,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:33,115 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-12-14 13:36:33,154 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-12-14 13:36:37,749 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12